Answer:
Let's call gene 1, 2, 3 as gene X, Y, Z respectively.
Parent 1 = xxYYZZ
Parent 2 = XXyyzz
(or vice versa)
Explanation:
Since all of the three mutations are said to be recessive and un-linked. According to the question statement, neither parents have the ability to make any antigen. When these two genotypes will be crossed, a genotype XxYyZz will be obtained. This one will be capable of producing antigen.
The medulla oblongs ya controls the contraction and relaxation of the blank causing the lungs to inflate and deflate during breathing.
Answer:
This question includes some errors, the question should be written as:
The medulla oblongata controls the contraction and relaxation of the ______ causing the lungs to inflate and deflate during breathing.
Although there are no options, the answer is generally RESPIRATORY MUSCLES i.e. diaphragm and intercostal muscles
Explanation:
Breathing is an involuntary action required to take place in order to get oxygen into the system and carbon dioxide out of the system. However, the process of breathing is neurally controlled by brain portion called RESPIRATORY CONTROL CENTERS.
The Medulla oblongata located in the hindbrain is one of the two respiratory control centers (the other being the PONS). The medulla sends nerve signals to the muscles responsible for bringing about the ventilation process i.e. the DIAPHRAGM and INTERCOSTAL MUSCLES.
This nerve impulse brings about the contraction of the diaphragm, which is the major respiratory muscle, and intercostal muscle causing the lungs to inflate and allow the entry of oxygen-containing air. On the other hand, it also brings about the relaxation of these muscles causing the lungs to deflate allowing the expelling of air.
Which statement best describes the relationship of photosynthesis and onorgy?
The process of photosynthesis is onergy storing bocause the process converts light onorgy into chemical energy,
which is stored in the bonds of glucoso,
The process of photosynthesis is onergy-releasing because the process convorts light onorgy into froo onorgy that
can be used for cell functions.
The process of photosynthesis is onergy conserving because no onergy is used throughout the process of forming
glucose and oxygen molecules,
The process of photosynthesis is onergy-wasting because photosynthesis is an inofficient process that doplotos
the cell of energy stored in the bonds of glucose.
The process of photosynthesis is onergy storing bocause the process converts light onorgy into chemical energy,
Burning fossil fuels is associated with a. climate cooling periods b. an enhanced greenhouse effect c. increased solar activity d. increased solar reflectivity
Answer:
B. An enhanced greenhouse effect
Explanation:
When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, causing global warming.
Already the average global temperature has increased by 1C.
Answer:
An enhanced greenhouse effect
Explanation:
Fossil fuels release carbon dioxide and nitrous oxide, both of which are greenhouse gases. This leads to greenhouse gas in the atmosphere and which is the greenhouse effect.
For a type of cat, short whiskers are dominant (S) and long whiskers are
recessive (s). The Punnett square below shows a cross between two cats.
What is the phenotype ratio for this cross?
sls
sssss
S
Ss
SS
A. O short, 4 long
B. 3 short, 1 long
C. 2 short, 2 long
D. 4 short, 0 long
The correct answer is option D) 4 short, 0 long.
What is the phenotype ratio?A phenotypic ratio is a quantitative relation between phenotypes showing the number of times the frequency of one phenotype correlates with another. When a researcher would like to obtain the gene expression for generations of an organism, they use the phenotypic ratio obtained from a test cross.
What is the phenotype ratio example?There are two dogs that are heterozygous for black coat color. In this breed, black fur is dominant over white fur. Thus, heterozygous dogs and homozygous dominant dogs have the same phenotype of black fur and homozygous recessive individuals have white fur.
Learn more about phenotype ratio here: brainly.com/question/14086976
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Answer:
C. 2 short, 2 long
Explanation:
Which of the following tissues would NOT be found in fibrovascular bundles?
Answer:
Phloem cells are hollow and nonliving, and they form a continuous pipeline that transports sugars.
hope this answer is correct ...
Which of these is an example of a haploid cell?
Answer:
Gametes
Explanation:
Gametes are an example of a haploid cell and are produced as a result of meiosis.
If any of these shark species were to go extinct, what would most likely be a result to their ecosystems?
Select one:
a. Nothing, sharks are only human killers.
b. The ecosystem would collapse because sharks are vital to their ecosystems.
c. The habitat would develop new species. With the sharks gone, new organisms can move in to fill that niche.
d. The ecosystem would get healthier. Sharks spend the majority of their time hunting and searching for humans to kill in there habitat
Answer:B
Explanation:
They are vital to there ecosystem
Which phrase best describes the biosphere? the rocks on land and in the water the plants on land and in the water the animals in the air, on land, and in the water the organisms in the air, on land, and in the water
Answer:
the organisms in the air, on land, and in the water
Explanation:
bc i saw quizlet
Answer:
d
Explanation:
edge 2021
After the centromeres separate during mitosis, the sister chromatids, now called _______, move toward opposite poles of the spindle.
Answer:
(E) daughter chromosomes
Explanation:
HELP PLS ANSWER THE ONES SHADED WITH BLUE (1,2,3,4,5,6,7,8,9)
Answer:
Definitions are given below.
Explanation:
1. Cytoplasm: It is a fluid made up of salt, water and nutrients. it provides medium for the organelles which is suspended in the cytoplasm.
2. Endoplasmic reticulum: It is responsible for the formation of protein and transport proteins from one place to another in the cell.
3. Golgi bodies: It modifies the protein which is received from endoplasmic reticulum and sent the protein where it is needed.
4. Mitochondria: It is also called powerhouse of the cell. it is responsible for the production of energy from breakdown of glucose molecule.
5. Lysosomes: It helps in breakdown of various materials and also protect the body from viruses and bacteria.
6. Cell membrane: It separates the inner environment of the cell from the external environment and also helps in protection.
7. Nucleolus: Its main function is to produce ribosomal units from proteins.
8. Vacuole: It is the storage house of the cell where food and nutrients are stored which are necessary for the survival of the cell.
9. Cell wall: It provides protection to the cell as well as provides structure to the cell.
For 2 minutes write down every sound you hear. Write in dot points.
What was the quietest noise? What was the loudest noise? Did you have any distractions?
Answer:
Sounds:
- water dripping
- tv
- ceiling fan
- siblings quarreling
- sparrows chirping
1- The sound of water dripping in the kitchen.
2- the sound of the tv.
3- yes, the Ceiling fan's sound.
Which of the following phenotypic classes reflect offspring that were generated as a result of a recombination event?
a. vestigial wings, red eyes
b. vestigial wings, purple eyes
c. full wings, red eyes
d. full wings, purple eyes
Answer:
The correct options are: A " vestigial wings, red eyes" and D "full wings, purple eyes"
Explanation:
female parent: vg+pr+/vg pr
(phenotype - full winged and red eyes)
male parent: vgpr/vgpr
(phenotype - vestigial winged and purple eyes)
Of these traits, vestigial wings and purple eyes are recessive traits. Hence, when a recombination event occurs, the offspring can potentially have a wild type trait paired with a recessive trait.
Suggest an intracellular regulatory molecule (from your text) that growth factors might stimulate to control cell division. Please describe how it works.
Answer:
E2F transcription factors
Explanation:
The E2F transcription factors (TFs) encode intracellular factors associated with the control of the cell cycle. E2F are TFs that bind to promoter consensus sequences in order to activate transcription. These TFs control the expression of target genes involved in cell proliferation including, among others, genes for DNA replication and mitotic activation. Moreover, the E2F proteins also may act as a link between cell fate and the cell cycle. The retinoblastoma (Rb) is a protein that modulates the activity of the E2F family of TFs, and it has been shown that the Rb/E2F pathway is a key molecular mechanism associated with cell proliferation.
Jacob calls his friend Mark to tell him the news, and to Jacob's surprise, Mark has heard of MSUD. In fact, Mark says that his wife is a carrier so he got tested to see if he was a carrier as well. After getting tested, Mark and his wife decided to have children because there was no increased risk of their child getting MSUD. Based on this information, Mark and his wife must have the genotype: g
Answer:
Explanation:
Since Mark's wife was a carrier, it means that she is heterozygous for the trait. And after Mark got tested, they decided to have children due to no increased risk if they do have children, it means the condition is not an autosomal dominant condition but a recessive condition because if the condition is dominant, only one copy of the affected allele is needed to increase risk.
Thus, with a no increased risk, it means Mark is normal i.e. carries no copy of the recessive allele.
Which mode of genetic recombination is matched correctly with its description? transduction—virus transfers genes from one bacteria to another conjugation—involves splitting of one cell and results in two identical cells binary fission—requires direct cell-to-cell contact of bacteria transformation—uses a pilus to transmit genetic information between bacteria
Answer:
transduction—virus transfers genes from one bacteria to another
Explanation:
Transduction is a mechanism of recombination where DNA fragments are inserted into bacteria by a viral vector. The mechanism of transduction is commonly used by molecular biology laboratories to insert gene fragments into both bacterial and mammalian cells.
Conjugation is the genetic mechanism in which bacteria transfer genetic information among them by direct contact.
Binary fission is the most common type of asexual reproduction in bacteria. In binary fission, the DNA molecule is replicated and, subsequently, the bacterial cell is divided into two daughter cells with identical genetic material.
Finally, the transformation is the mechanism of horizontal gene transfer in which one bacterium takes up genetic information into the surrounding environment and incorporates it into its genome.
Answer:
transduction—virus transfers genes from one bacteria to another
Explanation:
edge
There are two primary models of the universe. One is the expanding model, which says that the universe is constantly increasing in size. The other is, the steady state model, which says that the universe is approximately constant in size and shape. What evidence would you expect to see if the expanding model were correct?
Answer:
Ok, suppose that the universe is expanding:
If the universe is expanding, then the distance between "fixed" points in the universe (we can set the fixed points as planets, galaxies, etc) would change with the time.
This means that, if the distance between the Earth and a given star or planet (that is not in our nearby region) should change as time goes by.
Now, this was actually observed:
There is something called the doppler effect:
In a short way, if an object is moving away, the light that comes from that object will have a red shift (it seems a little more reddish than it actually is)
If the object is moving towards us, the light that comes from the object will have a blue shift (it seems a little more blueish than it actually is)
Those shifts can be observed from the Earth, so from that is safe to conclude that the expanding model is actually correct.
Answer:
Observing objects in the sky that gradually move away from Earth could prove that the expanding model is correct.
Explanation:
I need help as soon is possible pls!!!! A physicist is studying light absorbance in the ocean. He graphs his data as shown below. What color of light would most likely be present at 200 meters below sea level, and why? Justify your answer by using the provided data.
Answer:
blue
Explanation:
if you look at the graph, it's asking which color would most likely be present 200 meters below sea level. The only color/bar that comes close, or in this case surpasses 200m, is the color blue.
The blue color of light would most likely be present at 200 meters below sea level because the wavelength of the blue light falls under the visible light spectrum.
What is Absorbance?Absorbance may be defined as a quantity that can significantly be measured by the ability of a substance to absorb light of a specified wavelength. It is remarkably equal to the logarithm of the reciprocal of the transmittance.
According to the question and graph carefully, one can easily find out the light which has penetrated deep into the ocean is blue. Apart from this, blue light significantly has the shortest wavelength which means the highest energy.
Therefore, the color of light that has most likely been present at 200 meters below sea level is blue.
To learn more about Light absorbance, refer to the link:
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Estimate the volume of a human heart (in mL) using the following measurements/assumptions: Blood flow through the aorta is approximately 11.2 cm/s The diameter of the aorta is approximately 3.0 cm Assume the heart pumps its own volume with each beat Assume a pulse rate of 67 beats per minute.
Answer:
The correct answer is 70.92 ml.
Explanation:
Based on the given question, the rate of the flow of blood through the aorta (v) is 11.2 cm/s.
The given diameter of aorta is 3.0 cm
Thus, the radius (r) of aorta will be, 3.0/2 = 1.5 cm
The cross-sectional area of the aorta (A) will be calculated by using the formula, πr²
= π ×(1.5)² cm²
= 2.25 π cm²
The pulse rate given is 67 beats per minute, therefore, time taken for 67 beats is 60 seconds, hence, time taken for 1 beat will be 60/67 second
Now the volume of the heart will be,
= A × v × t
= 2.25 π cm² × 11.2 cm/s × 60/67 s
= 70.92 cm³
As 1 cm³ is equal to 1 ml. So, the volume of a human heart will be 70.92 ml.
percolation in terms of biology
Answer:
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Explanation:
Percolation in terms of biology means filtration of a liquid substance through a porous medium.
Please help me come up with an answer for this question thankyou so much! Compare and contrast the processes of cellular respiration and photosynthesis. Think of as many similarities and differences as you can (things to consider: inputs and outputs, the role of energy, the types of organisms that do each process, the location within cells)
Explanation:
The end result is glucose, with oxygen being the waste product. The two processes are similar in that they both produce energy, albeit in two different forms. They are different in that photosynthesis assembles the glucose molecule, while cellular respiration takes it apart.
Which type of cell can duplicate indefinitely?
Answer:
Embryonic stem cells
Explanation:
Answer:b
Explanation:
Considering the same population of cats as in Part A, what is the expected frequency of each genotype (TLTL, TLTS, TSTS ) based on the equation for Hardy-Weinberg equilibrium? Keep in mind that you just learned in Part A that: The allele frequency of TL is 0.4. The allele frequency of TS is 0.6.
Answer and Explanation:
Due to some technical problems, you will find the complete answer and explanation in the attached file.
Pedigrees are used to help geneticists understand how traits are inherited between generations. The Romanovs, a Russian royal family, had a history of hemophilia, a sex-linked disorder that is determined by a recessive allele on the X chromosome.
A genetic pedigree is shown. Irene is a carrier. Her husband is not a carrier. Her children Waldemar and Henry have hemophilia.
What is the best evidence to prove that Irene was heterozygous for hemophilia?
Alice carried the recessive allele.
Alexandra carried the recessive allele.
Frederick carried the recessive allele.
Waldemar carried the recessive allele.
Answer:
Waldemar carried the recessive allele.
Explanation:
The carrier is the individual that has the affected allele or mutation but does not express the trait, or might express it in different levels. Although, as the person carries the mutation, she or he might transmit the genetic mutation associated with a disease to the progeny. In general, these diseases are inherited as recessive traits.
So, in the exposed example we know that:
hemophilia is a sex-linked disorderhemophilia is determined by a recessive allele on the X chromosome.Irene is a carrier.Her husband is not a carrier.Her children Waldemar and Henry have hemophilia.If Irene is a carrier, this means that she is heterozygous and that her genotype is X⁺X⁻ (Being the symbol + the dominant allele, and - the recessive one for that expresses the trait)
The fact that Irene´s husband is not a carrier means that his genotype is X⁺Y
Their boys Waldemar and Henry have hemophilia, so both their genotypes are X⁻Y
The best evidence to prove that Irene was heterozygous for hemophilia is that Alice carried the recessive allele.
Alice is Irene´s Mother, and she is a carrier as well. Irene´s father, Louis, is not a carrier, so she could have inherited a dominant allele from her father and a recessive allele from her mother, X⁺X⁻, or she could have inherited two dominant alleles from both her parents X⁺X⁺. This is not proof enough of Irene being heterozygous. The fact that Alexandra, Irene´s sister, was also a carrier does not say anything about Irene´s genotype, because they could both share the same genotype or not. This is not proof of Irene being heterozygous.Frederick (her brother) was hemophilic. He received a recessive allele from Alice, but this does not say anything about Irene´s genotype. The fact that Waldemar (her son) was hemophilic, is the best evidence to prove that Irene was heterozygous for hemophilia. Walderman received the Y chromosome from his father and an X chromosome from his mother. The X chromosome that he received from his mother carried the recessive allele for the trait, and this is why he had hemophilia. This means that there is no best evidence for Irene´s genotype than her son´s genotype.
The___is the fluid component of blood.
Answer:
Plasma
Explanation:
The liquid portion of blood is called plasma, and it makes up more than half of our blood, precisely 55 percent.
Plasma is a light yellow, clear-ish liquid comprised of water, protein, salts, ions, nutrients and wastes.
Plasma helps deliver nutrients, hormones, enzymes, and proteins to other parts of the body. Additionally, cells deposit waste into the plasma. Plasma also carries the other solid parts of blood throughout the body.
Answer:
The Plasma is the fluid component of blood
Explanation:
I got it right on my test
During which period did humans first appear on Earth? Quaternary Neogene Paleogene Cenozoic
Answer:
the answer is actually Quaternary, please double check your answer before giving them out to people
we dont want them to get a bad grade
Explanation:
i took the test
E2020
In addition to the natural loss of muscle mass that occurs as we move into our older years, changes in lifestyle, such as transition from employment to retirement, also account for a decrease in ___________.
a. stress response
b. energy needs
c. hormones
d. brain activity
Answer:
B. Energy needs
Explanation:
As an individual ages there is a characteristic natural loss of muscle mass that occurs and increases as they move into older years. Changes in lifestyle, such as transition from employment to retirement, also account for a decrease in energy needs. This is because there is less amount of work done during retirement than when an individual is actively working.
The less amount of work is the reason why there is also a corresponding decrease in the energy needs.
Which of the following statements is true about Mendel?
Answer: c
Explanation:
Hope it helps <3
Which interaction is an example of commensalism?
O A. Insects helping plants reproduce while eating the nectar in their
flowers
O B. Bacteria living inside a human's stomach and making the person ill
C. Birds building nests in the branches of trees
O D. Mosquitoes eating the blood of cows and passing on a disease
SUB
Answer:
C
Explanation:
Commensalism is where one organism benefits while the other is neither harmed nor benefited.
A - Both parties benefit
B - Bacteria benefit, the human is harmed
C - Birds benefit, the tree neither
D - Mosquitoes benefit, cow is harmed
can a impact in one species over time can impact an ecosytem ?
Answer:
Yes
Explanation:
Yes, the impact on one species over time can impact ecosystem.
An ecosystem is consist of biotic and abiotic organisms. There is a major relationship between biotic and abiotic or biotic and biotic components.
The relationship between biotic and biotic components is called food chain, in which one organisms depends on others for their survival and balance the energy flow in the ecosystem. So impact on any one species in the food chain will impact the whole ecosystem.
For example: Plants are the producers in the food chain, and if plants will be impacted or destroyed over time, the consumers depending on the plants will die from starvation and disturb the energy flow in the ecosystem. Along with this, plants are also related to abiotic factors such as maintenance of oxygen and carbon dioxide in the atmosphere, so the balance of these gases will also get disturbed.
is the formation of a new species from an existing species and can occur in two phases.
Answer:
Meiosis
Explanation:
Meiosis is the formation of a new species from an existing species and can occur in two phases.
Hope it helps.
Answer:
Speciation
Explanation:
"Speciation is the formation of a new species from an existing species and can occur in two phases." (Correct on edg)