The blood in arteries is always oxygen-rich and always travels away from the heart. The correct answer is "a. is always oxygen-rich and always travels away from the heart."
Blood in the arteries, with the exception of the pulmonary artery, is oxygen-rich because it has just left the lungs after being oxygenated. Arteries are designed to carry blood away from the heart, while veins return blood to the heart.
Arteries carry oxygen-rich blood from the heart to various parts of the body. This oxygenated blood provides the necessary energy and nutrients for the cells to function properly.
Therefore, the blood in arteries is always oxygen-rich and always travels away from the heart. The option (a) is correct.
The complete question is:
Blood in arteries;
a. is always oxygen-rich and always travels away from the heart.
b. is always oxygen-rich.
c. travels from the lungs.
d. always travels away from the heart.
e. always travels toward the heart.
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in an ecosystem, where is species richness greatest? group of answer choices in the center of communities at the edges of adjacent communities in the ecotone species richness is equally distributed in ecosystems in specific areas where one species enjoys a decided dominance in specific areas where environmental stresses are the highest
The world's tropical regions are home to the most biodiversity, particularly among coral reefs and tropical rainforests. Hence (b) is the correct option.
Genetic change and evolutionary processes promote biodiversity; habitat loss, population decline, and extinction decrease it. One of the reasons tropical rainforests support such a wide variety of species is because they are the most prolific environment on Earth. The vast variety of life on Earth is referred to as biodiversity. It can be applied more precisely to all the species found in a certain area or environment.
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In an ecosystem, where is species richness greatest?
A. In the center of communities
B. at the edges or ecotones of adjacent communities
C. in specific areas where environmental stresses are the highest
D. in specific areas wehre one species enjoys a decided dominance
E. species richness is equally distributed in ecosystems
some tentative patterns that are emerging from the study of complex traits are that: select all that apply. genes involved in complex traits can show pleiotropy or epistasis, and most have major effects. most genes affecting complex traits have minor effects; few have major effects. many genes involved in complex traits show epistasis. genes involved in complex traits usually show pleiotropy or epistasis. many genes involved in complex traits are pleiotropic.
Genes involved in complex traits can show pleiotropy or epistasis. Pleiotropy is the ability of a single gene to have multiple effects on an individual's phenotype.
Epistasis is the interaction of multiple genes to control a single phenotype.Most genes affecting complex traits have minor effects; few have major effects. This means that many genes that contribute to complex traits have small effects, while only a few have major effects.Many genes involved in complex traits are pleiotropic.
This means that these genes have multiple effects on an individual's phenotype. Therefore, the options you should select for this question are genes involved in complex traits can show pleiotropy or epistasis, most genes affecting complex traits have minor effects; few have major effects, and many genes involved in complex traits are pleiotropic.
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true or false? it is impossible to prove that evolution is real because evolution doesn't work on a time scale that is observable within the human lifetime.
Given that evolution doesn't operate on a temporal frame that can be observed within a human lifespan, it is impossible to establish its veracity. This statement is false.
While it is true that the process of evolution operates on a timescale that is not easily observable within a single human lifetime, there is still a great deal of evidence that supports the theory of evolution. This evidence comes from a variety of sources, including the fossil record, genetic data, and observations of living organisms.
For example, the fossil record provides a wealth of evidence that supports the theory of evolution. By studying the patterns of life that existed in the past, scientists have been able to trace the evolutionary history of different species and groups of organisms.
In addition, genetic data provides strong evidence of evolutionary relationships between different organisms, and observations of living organisms show how natural selection can lead to changes in traits over time.
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Did the same thing happen to every type of light when it hit glass? Use evidence from the Sim to explain your answer.
Answer:its c
Explanation:
As blood flows through arterioles, which of the following always decreases?
(a) flow
(b) pressure
(c) resistance
calculate the expected na / k atpase activity (units/sec) in pkd cells treated with 10^6 pm ouabain.
The expected Na⁺/K⁺ ATPase activity in PKD cells treated with 10⁶ pm ouabain would depend on various factors, including the baseline Na⁺/K⁺ ATPase activity in PKD cells, the concentration of ouabain used, and the duration of treatment.
The Na⁺/K⁺ ATPase is a transmembrane protein that plays a critical role in maintaining the electrochemical gradient across cell membranes. It is responsible for pumping three sodium ions (Na⁺) out of the cell for every two potassium ions (K⁺) pumped into the cell, using ATP as an energy source. This process is essential for many physiological functions, including the regulation of cell volume, the transmission of nerve impulses, and the maintenance of ion balance.
Ouabain is a cardiac glycoside that inhibits Na⁺/K⁺ ATPase activity. At low concentrations, ouabain can stimulate Na⁺/K⁺ ATPase activity, but at high concentrations, it inhibits the enzyme irreversibly.
The baseline Na⁺/K⁺ ATPase activity in PKD cells, the dosage of ouabain, and the length of the therapy are all variables that will affect the predicted Na⁺/K⁺ ATPase activity in PKD cells treated with 10⁶ pm ouabain.
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in response to an increase in the [glucose], the pancreas releases insulin into the bloodstream. what is the effect of insulin on adipocytes (fat cells) and muscle cells?
In response to an increase in glucose, the pancreas releases insulin into the bloodstream. The effect of insulin on adipocytes (fat cells) and muscle cells is that it stimulates glucose uptake and storage.
In adipocytes, insulin triggers the synthesis of lipoprotein lipase, which breaks down triglycerides to produce fatty acids and glycerol. These molecules are then stored as triglycerides in adipose tissue. Insulin also inhibits the activity of hormone-sensitive lipase, which breaks down triglycerides to release fatty acids.
In muscle cells, insulin stimulates glucose uptake by triggering the translocation of glucose transporters from the intracellular vesicles to the plasma membrane. This allows glucose to enter the muscle cell and be stored as glycogen.
Insulin also stimulates glycogen synthesis by activating glycogen synthase and inhibiting glycogen phosphorylase. The net effect of these processes is to decrease blood glucose levels by increasing glucose uptake and storage in adipocytes and muscle cells.
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all animals share similar characteristics, which ones? question 5 options: have cell walls, photosynthesize, and are prokaryotes. do not have cell walls, do not photosynthesize, and are eukaryotes. do not have cell walls, do not photosynthesize, and are prokaryotes. have cell walls, photosynthesize, and are eukaryotes.
[tex]\blue{\huge {\mathrm{MULTIPLE \; CHOICES}}}[/tex]
[tex]\\[/tex]
[tex]{===========================================}[/tex]
[tex]{\underline{\huge \mathbb{Q} {\large \mathrm {UESTION : }}}}[/tex]
All animals share similar characteristics, which ones?
A) Have cell walls, photosynthesize, and are prokaryotes.B) Do not have cell walls, do not photosynthesize, and are eukaryotes.C) Do not have cell walls, do not photosynthesize, and are prokaryotes.D) Have cell walls, photosynthesize, and are eukaryotes.[tex]{===========================================}[/tex]
[tex] {\underline{\huge \mathbb{A} {\large \mathrm {NSWER : }}}} [/tex]
The correct answer is: B) Do not have cell walls, do not photosynthesize, and are eukaryotes.[tex]{===========================================}[/tex]
[tex]{\underline{\huge \mathbb{E} {\large \mathrm {XPLANATION : }}}}[/tex]
While animals are diverse in their forms and functions, they share some general characteristics. All animals are multicellular eukaryotes, which means that their cells have a well-defined nucleus and other membrane-bound organelles.
Furthermore, animals obtain energy by consuming organic matter, rather than by photosynthesis, as plants do. Lastly, animals do not have cell walls, unlike bacteria and plants, which do.
[tex]{===========================================}[/tex]
[tex]- \large\sf\copyright \: \large\tt{AriesLaveau}\large\qquad\qquad\qquad\qquad\qquad\qquad\tt 04/02/2023[/tex]
The shared characteristics of animals are that they are eukaryotic organisms without cell walls and do not photosynthesize.
All animals share some common characteristics, and among the given options, the correct one is that they do not have cell walls, do not photosynthesize, and are eukaryotes. Animals are part of the kingdom Animalia, which consists of multicellular organisms that are eukaryotic, meaning they have cells with a nucleus and membrane-bound organelles. Unlike plants and some other organisms, animal cells do not have cell walls, which allows for more flexibility and movement. Additionally, animals do not photosynthesize. Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose or other sugars. Instead of photosynthesizing, animals obtain energy by consuming other organisms, either directly or indirectly.
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suppose an f1 male of genotype xw p[w ]/y; cy/cy ; sb/sb (carrying the transgene on his x chromosome) was mated to a tester female of genotype xw/xw; cy /cy ; sb /sb that lacked the transgene. considering all possible sperm that the f1 male can produce (and there are no crossovers in meiosis), what proportion of all f2 offspring should be white-eyed, stubble bristle males?
The total F2 offspring that will be white-eyed, stubble bristle male is around 25% or ¼th of the population.
The proportion of white-eyed, stubble-bristle males in the F2 offspring is 25%. This is because the F1 male carries the transgene on his X chromosome, and all of his sperm will carry either the wild-type or the transgenic X chromosome.
Each sperm has an equal chance of combining with either the X chromosome from the tester female that carries the p[w] allele or the X chromosome that lacks the p[w] allele. The probability of an XwY; cy/cy; sb/sb offspring is 1/4, so 25% of all F2 offspring will be white-eyed, stubble-bristle males.
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if griffith had injected a fifth group of mice with a combination of heat-killed rough strain and heat-killed smooth strain, would the mice have died?
No, since mice cannot contract the heat-killed rough strain of bacteria. In the pivotal experiment, Frederick Griffith (1928) combined live R and S that had been destroyed by heat; he then injected the mixture into mice; the animals perished.
The tissues of the dead mouse were found to contain S-like smooth-coated living bacteria. While mice injected with the R strain did not pass away, animals injected with the S strain did within a few days of injection. Griffith proved through a series of tests that heating the bacteria rendered the S strain less virulent. Griffith put live, non-lethal germs into the mice along with his heat-killed, disease-causing microorganisms. The mice got pneumonia and passed away.
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What aspect of Mundra’s culture is revealed in Paragraph 8 of the story?
Young people are encouraged to make their own choices about marriage.
After the wedding, newly married couples usually live with the bride’s family.
Once a person marries into a family, he or she becomes family for life.
It is customary for people from the same social class to marry.
Answer:
It is customary for people from the same social class to marry.
what is thought to be the most prominent difference in the brains of prairie voles and montane voles, which could explain differences in mating behaviors?
Prairie vole OT receptors are located in the nucleus accumbens and prelimbic cortex of the brain, while montane vole OT receptors are located in the lateral septum. These brain areas are linked to reward.
The distinct V1a-receptor binding patterns in the brains of a) the monogamous prairie vole and b) the nonmonogamous montane vole are shown by receptor autoradiography. Notice the strong binding in the diagonal band (DB) of the prairie vole but not the montane vole, as well as the lateral septum (LS) of the montane vole but not the prairie vole.
Such variations can be seen all across the brain. c) Male prairie voles, but not montane voles, show greater levels of affiliative behaviour after receiving AVP intravenously. AVP injections in each group of voles were compared to controls, which received injections of artificial cerebrospinal fluid (CSF).
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haemophilia is a recessive, sex-linked genetic disorder that has been observed at high frequencies in certain royal families where royal family members sometimes married and produced offspring with somewhat close relatives (first-cousins, second-cousins, etc.). what two terms that we talked about contributed to this proportional increase in what is typically a rare genetic disease?
The two terms that contributed to the proportional increase in hemophilia in certain royal families are "recessive" and "inbreeding."
Being a recessive genetic disorder, hemophilia requires two copies of the defective gene to manifest in a person (one from each parent). Inbreeding, or the act of mating closely related people, raises the possibility that both parents have a gene that has been altered. This raises the possibility that their offspring may acquire two copies of the altered gene and become afflicted with the disorder.
Marriages between close relatives (such as first- or second-cousins, etc.) were frequent in several royal houses, which raised the risk of receiving two copies of the hemophilia gene and developing the condition. This helped explain why hemophilia was more common in these families than it would have been in the general community, since it is a rather uncommon hereditary condition.
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which of the following are true about peas? group of answer choices a. they are planted early in the season b. garden peas are best eaten pod and all c. they will tolerate frost d. snow peas have edible pods e. all except b
The correct statements about peas are that they are grown early in the season, tolerate frost, and snow peas have edible pods. Thus, option E: all except B is the right choice.
All of the above are true regarding peas, with the exception of b) garden peas are best eaten whole, including the pod. It's best to shell garden peas before eating them. The plant family Fabaceae, also known as the bean family or the pulse family, includes peas. Compared to snow peas and snap peas, which are grown inside edible pods, garden peas have a slightly sweeter flavor.
Pea plants self-pollinate by nature. Before the flowers open, self-pollination takes place when the blooms are closed and pollen from the plant contacts the female ovary of the same plant. The pollen-producing stamen of pea flowers can be removed from flower buds to prevent self-pollution and facilitate cross-pollination by simply dusting pollen from one plant onto the stigma of another.
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1. In the islands, scientists have observed fish-eating snakes! These snakes
slither into the shallows of the ocean and catch small fish. Give two reasons
why this adaptation might occur:
Answer: Firstly due to smaller in numbers they have no impact over larger fish species. Secondly due to non availability of their favourable environment they are unable to adapt easily
Explanation:
A plant with white flowers was crossed with a plant with yellow flowers.
Fifteen of the offspring had white flowers, and five had yellow flowers. What
conclusion can you draw?
A. The offspring were pure-breeding.
B. The allele for white flowers is dominant.
C. The allele for yellow flowers is dominant.
D. The parent plants were pure-breeding.
when researchers stimulated the during laboratory experimentation, eating behaviors were inhibited. please choose the correct answer from the following choices, and then select the submit answer button. answer choices lateral hypothalamus ventromedial hypothalamus lateral hippocampus ventromedial hippocampus
In a lab experiment, eating behaviors were suppressed when the ventromedial hypothalamus was activated. The solution is Option B.
The hypothalamic ventromedial nucleus (VMN, VMH, or ventromedial hypothalamus) is a nucleus that controls sexual activity, fear, appetite, and temperature regulation. It's referred to as a "satiety center". Another area of the brain thought to regulate eating is the lateral hypothalamus.
Scientists have discovered that stimulating electrodes placed in an animal's lateral hypothalamus will alter the animal's eating habits. The circuit, which is located in the "bed nucleus of the stria terminalis" (BNST), influences eating by suppressing activity in the lateral hypothalamus, a part of the brain that is known to regulate eating.
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Correct question is:
when researchers stimulated the during laboratory experimentation, eating behaviors were inhibited.
please choose the correct answer from the following choices, and then select the submit answer button. answer choices
lateral hypothalamus
ventromedial hypothalamus
lateral hippocampus
ventromedial hippocampus
Use the terms system and subsystem to describe how specialized cells, xylem, phloem, vascular bundles, the stem, and leaves work together in a celery plant.
The xylem subsystem is responsible for transporting water and minerals from the roots up to the leaves, while the phloem subsystem is responsible for transporting the products of photosynthesis, such as sugars, from the leaves down to the rest of the plant. The vascular bundles within the stem of the celery plant contain both xylem and phloem tissues, which work together to ensure that the plant receives the nutrients it needs to grow and thrive.
What are specialized cells?The specialized xylem and phloem cells in a celery plant collaborate as parts of the plant's overall structure. For the leaves and the remainder of the plant, the stem serves as a support structure and connector.
It gives the xylem and phloem components a route to move water, nutrients, and sugars throughout the plant. It also aids in supporting the leaves so they are facing the sun so they can perform photosynthesis.
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What are examples of environmental pressues choose more than one answer
research notes about WATER PURIFICATION...
FACTS ABOUT THIS TOPIC AND OTHER INFORMATION I CAN GET ABOUT IT FOR MY PROJECT
Introduction:
Chemicals and bacteria are killed and removed from water during water purification. The purification of water is not only for drinking, but it can also be used in industrial, medical, and scientific applications. Water can be purified in a number of ways. Water makes up 70% of the human body, and drinking unsafe water will affect a minimum of 70% of our body. It is imperative to monitor all water sources in order to keep people safe. It is impossible to tell whether water is safe just by looking at it.
Importance of having clean water.
UV Water Purification. UV stands for Ultra Violet. With UV systems, 99.99% of harmful microorganisms can be destroyed without any chemicals or changing the taste or look of your water. United States FDA approved it in the top 4 water purification techniques. Ultra Violet Water Purification proved to be a quick, cost-effective, and reliable method of purifying water. UV is a safe, clean, and easy method. It uses Ultra Violet light to kill microorganisms. This technology is already proven without drawbacks.
studies have been done on monozygotic twins that were separated soon after birth and raised in separate homes, often in different parts of the country. many of these twins did not know that they had a twin until after they reached adulthood. for certain traits, concordance values were found to be similar in these twins to those of monozygotic twins raised together. what can be concluded about these traits?
Monozygotic twins raised independently showed high concordance values for a few variables, indicating that these traits are highly heritable and likely impacted more by genetics than environmental influences.
The proportion of twin pairs when both twins share the same feature or disease is known as concordance. Dizygotic (fraternal) twins typically share 50% of their genetic material, compared to 100% shared by monozygotic (identical) twins. Researchers can ascertain the relative contributions of genetics and environment to the development of a specific characteristic by contrasting the concordance values of monozygotic twins reared together with those of monozygotic twins grown separately.
Given that the twins were reared in different contexts yet still showed high levels of trait similarity, if the concordance values are similar between the two groups of twins, it is likely that genetics played a significant influence in the formation of the characteristic. The concordance values, on the other hand, indicate that environmental influences have a bigger impact on the development of the characteristic if they are significantly different.
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the scientists reasoned that each of the three models would predict different dna banding patterns after the two rounds of replication. can you identify the banding patterns predicted by each model after the first round of replication? (then, in part c, you will identify the banding patterns predicted after the second round of replication.) drag the test tubes to the appropriate locations in the table to show the banding patterns that each model predicts. test tubes may be used once, more than once, or not at all.
The researchers reasoned that each of the three models would forecast various DNA banding patterns following the two replication cycles.
The conservative, semi-conservative, and dispersive theories of DNA replication were put to the test in the Meselson-Stahl experiment. The scientists separated the DNA using a density gradient centrifuge after each replication cycle.
According to the dispersive model, DNA replication produces two DNA molecules that are "hybrids," or mixtures of the daughter's and parent's DNA. Each individual strand in this model is made up of both old and fresh DNA.
Each new double helix in the semi-conservative model has one old strand (taken from the parent molecule) and one new strand. The parental double helix is restored in the conservative model by the reassociation of the two parental strands after they have served as templates for new strands.
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Complete question is:
Meselson and Stahl designed an experiment that would allow them to discern whether DNA replication occurs in a dispersive, semiconservative, or conservative manner.
They started with E. coli that had been growing for many generations in medium containing 15N.
They then transferred the bacteria into medium containing only 14N, and allowed the bacteria to undergo two rounds of DNA replication.
After each round of replication, the scientists performed density-gradient centrifugation of the DNA.
The scientists reasoned that each of the three models would predict different DNA banding patterns after the two rounds of replication.
Can you identify the banding patterns predicted by each model after the first round of replication?
Drag the test tubes to the appropriate locations in the table to show the banding patterns that each model predicts. Test tubes may be used once, more than once, or not at all.
(Refer the image)
Question 2
Farmers often drill wells into the groundwater systems to provide the water
necessary to supply their crops. In which areas of the United States would
farmers' wells MOST LIKELY take the longest to run out of water?
A areas on either side of the Rocky Mountains
B areas on either side of the Cascade Mountains
C areas on either side of the Appalachian Mountains
D areas on either side of the Sierra Nevada Mountains
The areas of the United States that farmers' wells would MOST LIKELY take the longest to run out of water is areas on either side of the Rocky Mountains.
option A.
What area would farmers' wells would MOST LIKELY take the longest to run out of water?A areas on either side of the Rocky Mountains are most likely to have wells that take the longest to run out of water.
This is because these areas generally have more abundant groundwater resources due to the high precipitation rates and snowmelt from the mountains, which recharge the aquifers.
Additionally, the geology of the region, including permeable rocks and sediments, allows water to be stored in the aquifers and replenished at a relatively fast rate. In contrast, the other mountain ranges listed may have more limited groundwater resources due to lower precipitation rates and less permeable geology.
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recall that the plasma proteins in blood include albumins, globulins, and fibrinogen (as you saw in chapter 11: the cardiovascular system: blood). globulins make up about one-third of the plasma proteins. they include antibodies, also called immunoglobulins, and transport proteins. which plasma protein is a major contributor to osmotic pressure?
Albumin is the plasma protein which is a major contributor to osmotic pressure.
By their weight, the majority of plasma proteins are composed of the tiny protein albumin. The liver is the location where this protein is manufactured. Osmotic pressure regulates the fluid balance between blood plasma and extracellular fluid.
A family of globular proteins known as globulins is soluble in diluted salt solutions but is insoluble in pure water and has a larger molecular weight than albumin. While the immune system produces some globulins, the liver produces others. The three main blood proteins are fibrinogen, albumin, and globulin.
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Correct question:
Recall that the plasma proteins in blood include albumins, globulins, and fibrinogen. Globulins make up about one-third of the plasma proteins. They include antibodies, also called immunoglobulins, and transport proteins.
Which plasma protein is a major contributor to osmotic pressure?
Explain the strengths and limitations of using 16S rRNA for phylogenetic analyses.
16S rRNA is a widely used molecular marker for phylogenetic analyses and is found in the small subunit ribosomal RNA of prokaryotes (bacteria and archaea).
What is ribosomal RNA?
Here are the strengths and limitations of using 16S rRNA for phylogenetic analyses:
High Conservation: The 16S rRNA gene is highly conserved across different bacterial and archaeal species, meaning that the same gene can be found in many different organisms. This allows for comparisons between different species and can be used to establish evolutionary relationships.
Slow evolution: The 16S rRNA gene evolves at a relatively slow rate, which makes it suitable for analyzing relationships between distantly related organisms.
Amplification: The 16S rRNA gene can be easily amplified by polymerase chain reaction (PCR) techniques, allowing for the study of organisms that cannot be cultured.
Publicly available databases: There are extensive publicly available databases that contain 16S rRNA sequences from many different organisms, which facilitates comparative analyses.
Limitations:
Limited resolution: While 16S rRNA provides a good overview of evolutionary relationships, it can have limited resolution at the species or strain level, meaning that it may not be able to differentiate closely related organisms.
Horizontal gene transfer: The 16S rRNA gene can be horizontally transferred between different species, which can complicate phylogenetic analyses.
Genetic diversity: Different bacteria and archaea may have different numbers of copies of the 16S rRNA gene, making it difficult to compare between different species.
Inaccurate annotations: There is a possibility of misannotation or errors in public databases that contain 16S rRNA sequences, which can lead to inaccurate results.
In summary, 16S rRNA is a useful tool for analyzing evolutionary relationships between different bacterial and archaeal species, but it has limitations and should be used in conjunction with other molecular markers and techniques for more accurate and comprehensive analyses.
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PLEASEEEEE
EMERGENCY
Its a bio thing.
I need this real fast please.
The b of the unique Unigriffin are derived from the transcription o the DNA to mRNA and the translation of the mRNA to protein.
What are the unique traits of the Unigriffin?The unique traits are determined as follows:
DNA: | CAG TCG TTT | ATG GGG CTT CTT TTT | GAG AAT TCA CGC |
mRNA: | GUC AGC AAA | AUG GGG CUU CUU UUU | GAG AAU UCA CGC |
amino acids: | Val - Ser - Lys | Met - Gly - Leu - Leu - Phe | Glu - Asn - Ser - Arg |
Traits: The DNA sequence provided specifies the following traits
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write this in an essay: describe how one neuron communicates with another neuron and causes that neuron to -fire an action potential (incorporate terms discussed in presentation: resting potential, excitatory post synaptic potential, presynaptic neuron, postsynaptic neuron) -become inhibited (incorporate terms discussed in presentation: inhibitory post synaptic potential, presynaptic neuron, postsynaptic neuron)
Across synapses, neurons communicate. Neurotransmitter is released from the neuron into the synaptic cleft when an action potential reaches the presynaptic terminal.
Across synapses, neurons communicate. A neuron releases neurotransmitter into the synaptic cleft, a 20–40 nm gap between the presynaptic axon terminal and the postsynaptic dendrite, when an action potential reaches the presynaptic terminal (often a spine).
After crossing the synaptic cleft, the transmitter attaches to receptors for neurotransmitters on the postsynaptic side. Depending on the type of neuron that released the neurotransmitter, specific positive (Na+, K+, Ca+) or negative ions (Cl-), for example, will pass through channels that span the membrane.
The signal is changed back into an electrical form when a transmitter binds to a postsynaptic receptor when charged ions enter or exit the postsynaptic neuron. The release of neurotransmitters at synapses may be seen as the conversion of an electrical signal (the action potential) into a chemical signal.
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which of the following is false about the genetic code? a. it is specific. b. it uses only one codon for each amino acid. c. it is the same in e coli and humans, that is, it is nearly universal. d. it is triplet.
The false statement about the genetic code is "b. it uses only one codon for each amino acid.
" The genetic code is degenerate, meaning that more than one codon can specify the same amino acid. For example, the amino acid leucine is specified by six different codons (CUU, CUC, CUA, CUG, UUA, UUG). However, each codon specifies only one amino acid. The genetic code is also nearly universal, meaning that the same codons specify the same amino acids in almost all living organisms.
Additionally, the genetic code is triplet, with each codon consisting of three nucleotides. This allows for the 64 possible combinations of codons that can specify the 20 different amino acids used to make proteins. The specificity of the genetic code ensures that the correct amino acids are assembled in the correct order during protein synthesis.
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Which best describes carbon dioxide’s path out of the body? a. nose → pharynx → larynx → trachea → bronchus → alveoli b. alveoli → trachea → bronchus → larynx → pharynx → nose c. alveoli → bronchus → trachea → larynx → pharynx → nose d. nose → larynx → pharynx → trachea → bronchus → alveoli
The best description carbon dioxide ’s path out of the body - alveoli → trachea → bronchus → larynx → pharynx → nose. Therefore the correct option is option B.
Carbon dioxide is a waste product of cellular respiration that diffuses out of cells into the bloodstream. It is then transported to the lungs where it diffuses across the walls of the pulmonary capillaries and into the alveoli.
From the alveoli, it travels through the respiratory system in the following order: trachea, bronchus, larynx, pharynx, and finally exits through the nose or mouth during exhalation.
Therefore the correct option is option B - alveoli → trachea → bronchus → larynx → pharynx → nose.
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how is it possible for one species to produce many other species? to fill all the needed jobs in their ecosystem properly, anolis lizards diverged into exactly the amount of species necessary for their habitat. without competition from other species, the one species was able to adapt to fit all of the available habitat types. because the islands were isolated for an extended period, a lack of interbreeding between populations of the same species caused all the species to diverge. because the anolis lizards have such a diverse range of characteristics, they were able to produce many different species.
One species to produce many other species because without competition from other species, the one species was able to adapt to fit all of the available habitat types.
D is the correct answer.
The process of diversification results in the emergence of new species. An ancestral species that can no longer interbreed divides into two or more descendant species that are genetically distinct from one another during speciation. According to Darwin, speciation is a spreading process.
The likelihood of two distinct species evolving from a single ancestral species is high. The reproductive isolation of groups within the initial population and the development of genetic differences between the two groups are the two main causes of speciation.
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The complete question is:
How did one species produce so many different species (the six ecomorphs)?
A) Because the islands were isolated for an extended period, a lack of interbreeding between populations of the same species caused all the species to diverge.
B) Because the Anolis lizards have such a diverse range of characteristics, they were able to produce many different species.
C) To fill all the needed jobs in their ecosystem properly, Anolis lizards diverged into exactly the amount of species necessary for their habitat.
D) Without competition from other species, the one species was able to adapt to fit all of the available habitat types.