Answer:
true
Explanation:
In pea plants, the allele for tallness is dominant (T) to the allele for shortness (t). A pea plant that is tall (TT) is mated with another pea plant that is short (tt). Which of the following is correct about their offspring? (Do a Punnett square if needed!) *
1. Half (50%) of the offspring will have the dominant allele
2. All of the offspring will be short
3. All of the offspring will be tall
4. Half (50%) of the offspring will carry the recessive allele
What cross will result in a 1:2:1 genotype ratio in the offspring?
Answer:
Bb and Bb
Explanation:
A man with type AB blood is married to a woman with type O blood. they have two natural children and one adopted child. Jane has type A blood, Jordan has type B blood and Marlin has type O blood. which child was adopted and how's do you know
Answer:
//
Explanation:
Jordan is adopted because if one if your parents has O blood you have O blood
and you cant roulette a blood type and get B
Well-known persistent organic pollutants (POPs) such as Aldrin, DDT, and PCBs are all __________.
a.
banned in the United States
b.
commonly used herbicides in the United States
c.
restricted in the United States
d.
by-products of acid rain
e.
none of the above
Answer:
A, banned in the United States
Explanation:
I looked up "Is Aldrin banned in the US?", "Are PCBs banned in the US?", etc. They're all banned.
PLEASE HELP!!
Describe an example of how gene expression is regulated.
Answer:
Gene regulation is how a cell controls which genes, out of the many genes in its genome, are expressed. These different patterns of gene expression cause your various cell types to have different sets of proteins, making each cell type uniquely specialized to do its own job.
Explanation:
An example of gene expression is the differential expression of the genes in human cells. All types of human cells contain the same DNA however they have very different structures and functions to perform. Liver cells and neurons present in the brain contain the same DNA yet they are very different in structure and function.
What is Gene expression?Gene expression is the process through which information from a gene is used in the synthesis of a functional gene product which enables it to produce end products, such as proteins or non-coding RNA molecules, and ultimately affect a phenotype, as the final effect of their expression.
Gene regulation is the process through which a cell controls which genes, out of the many genes in its genome, are expressed in the body. These different patterns of gene expression can cause various cell types to have different sets of proteins, thus making each cell type uniquely specialized to do its own job from the other.
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Electrical impulses travel down Bundle of His/Purkinje fibres resulting in which stage of the cardiac cycle?
a.Sino atrial(SA) contraction
b.Diastole
c.Ventricular contraction
d.Atrial contraction
Answer:
The correct answer is c.
Explanation:
The cardiac impulse spreads through a bundle of fibers that is a bridge between the atrioventricular node and the ventricular branches, called the bundle of His, supplied by branches of the right coronary artery and the anterior descending artery. The bundle of His is divided into 4 branches: the right and left branches and the latter is divided into the anterior left fascicle and the posterior left fascicle, from where the electrical impulse is distributed to the ventricles through a network of fibers that cause contraction ventricular cells called Purkinje fibers, triggering ventricular contraction. The AV bundle conducts the impulse from the atria to the ventricles. The right and left branches of the Purkinje fibers conduct the cardiac stimulus to all parts of the ventricles. Purkinje fibers or tissue are located in the inner ventricular walls of the heart, below the endocardium. These fibers are specialized myocardial fibers that conduct an electrical stimulus or impulse that intervenes in the heart's nerve impulse causing it to contract in a coordinated manner.
Cancer is often characterized by tumors. Which would most likely trigger the formation of a tumor?
Answer:
When cancer cells begin new tumors far from the primary tumor, metastasis has occurred.
Question 10
6.7 pts
Which of the following most likely happens in the cells of a person running a
marathon?
The respiration rate increases to produce more ATP.
The cell division rate increases to produce more muscle fibers
The photosynthesis rate increases to produce more sugars
The replication rate increases to produce more DNA
Answer:
The respiration rate increases to produce more ATP.
Explanation:
Running requires energy so the cells need to make more ATP through cellular respiration.
Would
you
be likely
to find the fossil remains of a jellyfish or a worm?
Answer:
jellyfish is the correct answer
Why does the exploratorium dissect cow eyes?
Answer:At the Exploratorium, we dissect cows' eyes to show people how an eye works. ... A tough, clear covering over the iris and the pupil that helps protect the eye. Light bends as it passes through the cornea. This is the first step in making an image on the retina.
Explanation:
The Exploratorium dissects cow eyes to provide visitors with a hands-on learning experience that helps them understand the anatomy and functioning of eyes.
Cow eye dissection is a popular educational activity at the Exploratorium and similar science museums because it offers a unique opportunity for visitors to engage with real anatomical specimens and gain insights into the complexity of the eye's structure and function. This hands-on experience fosters a deeper understanding of the visual system, how light is focused, and how images are processed by the brain.
The activity allows visitors to compare the similarities and differences between cow eyes and human eyes, leading to discussions about animal adaptations and evolution. Overall, cow eye dissection is an effective and engaging educational tool that promotes scientific inquiry, curiosity, and a better understanding of the remarkable complexities of the visual system.
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Which statement is TRUE regarding dopamine? O High levels of dopamine are related with symptoms of autism O Low levels of dopamine are related with symptoms of Parkinson's disease O Dopamine makes activities like sex and eating less pleasurable Dopamine was the first neurotransmitter to be discovered
Answer:
Low levels of dopamine are related with symptoms of Parkinson's disease.
You decide to conduct a genetic analysis of these mutant lines by crossing each with a pure-breeding wild-type line. The numbers in the F2 indicate the number of progeny in each phenotypic class. Three crosses between pure lines. Cross 1 between plants with twisted and wild-type leaves results in plants with twisted leaves. An F1 F1 cross results in 53 plants with twisted leaves and 18 wild-type plants. Cross 2 between plants with forked and wild-type leaves results in plants with forked leaves. An F1 F1 cross results in 49 forked and 16 wild-type plants. Cross 3 between plants with pale and wild-type leaves results in plants with leaves of intermediate color. An F1 F1 cross results in 34 plants with intermediate leaves, 17 wild-type plants, and 16 plants with pale leaves. From these results, determine the relationship between the mutant allele and its corresponding wild-type allele in each line. Label each mutant line with the best statement from the list below. Labels may be used once, more than once, or not at all
Complete question:
You will find the complete question in the attached files
Answer:
For the twist trait: The mutant allele is dominant to its corresponding wild-type allele For the forked trait: the mutant allele is dominant to its corresponding wild-type allele For the pale trait: The mutant allele is neither dominant nor completely recessive to its corresponding wild-type alleleExplanation:
Cross 1: twisted x wild-type ----> Pure linesParentals) TT x tt
F1) twisted leaves, Tt. ---> Heterozygous
Parentals) Tt x Tt
Punnett square) T t
T TT Tt
t Tt tt
F2) 53 twisted, 18 wild-type
Total number of individuals in the F2 = 53 + 18 = 71
71 plants -------- 100% of the F2
53 twisted------X = 75% TT + Tt
18 wild-type----X = 25% tt
Phenotypic ratio 3:1
The phenotype of the F1 and F2 progeny tells us that the twist trait is dominant over the wild type. The fact that the whole F1 generation was twisted is enough information to assume that the wild type is recessive and the twisted is dominant. Also, the phenotypic ratio of the F2 corroborates this assumption.
Cross 2: forked x wild-type ---> Pure LinesParentals) FF x ff
F1) 100% forked, Ff----> Heterozygous
Parentals) Ff x Ff
Punnett square) F f
F FF Ff
f Ff ff
F2) 49 forked and 16 wild-type plants
Total number of individuals in the F2 = 49 + 16 = 65
65 plants -------- 100% of the F2
49 forked------X = 75% FF + Ff
16 wild-type----X = 25% ff
Phenotypic ratio 3:1
The phenotype of the F1 and F2 progeny tells us that the twist trait is dominant over the wild type. The fact that the whole F1 generation was forked is enough information to assume that the wild type is recessive and the forked is dominant. Also, the phenotypic ratio of the F2 corroborates this assumption.
Cross 3: pale x wild-type ---> Pure linesParentals) PP x pp
F1) 100% Pp, intermediate color.
Parentals) Pp x Pp
Punnett square) P p
P PP Pp
p Pp pp
F2) 34 intermediate, 17 wild-types, and 16 pale.
Total number of individuals in the F2 = 34 + 17 + 16 = 67
67 plants -------------- 100% of the F2
34 intermediate ------X = 51% Pp
17 wild-type-------------X = 25% pp
16 pale -------------------X = 24% PP
Phenotypic ratio 1:2:1
The phenotype of the F1 and F2 progeny tells us that the pale trait is not dominant neither recessive to the wild type. The fact that the whole F1 generation was intermediate is enough information to assume that none of the traits dominates over the other. This is a case of incomplete dominance. The heterozygous individual express an intermediate phenotype between both the parentals´ one. Also, the phenotypic ratio of the F2 corroborates this assumption.
Can you get water out your blood stream please help I’m scared
Answer:
i wish i could help i don't know
Explanation:
Identify the main difference between prokaryotes and eukaryotes.
O Prokaryotes are multicellular while eukaryotes are mostly unicellular
Prokaryotes lack a nucleus and membrane bound organelles while eukaryotes have a
nucleus and membrane bound organelles
Prokaryotes are very complicated, advanced organisms and eukaryotes are very
primitive organisms
Prokaryotes are only found in aquatic environments while eukaryotes can be found
everywhere on Earth
Answer:
Prokaryote slack a nucleus and membrane bound organelles while eukaryotes have a nucleus and membrane bound organelles
Explanation:
None of the other answers make sense and also I took bio this year. Hope this hellped
Give me brainliest?
lew
Active
1
2
3
4
Which level of organization is characterized by a group of cells that work together to perform a common function?
organ
tissue
organ system
O organism
Answer:
tissue. . . . . . . . . . . . . .
An illustration of a cell interacting with its environment is provided.
The illustration best represents which of the following ?
A.Water moving into a cell by the process of osmosis
B.Passive transport of solute into the cell by diffusion
C.Active transport of solute into the cell using energy
D.Water leaving the cell by the process of osmosis
In the cell, there is passive transport of solute into the cell by the process of diffusion. So the correct option is B.
What is diffusion?Diffusion is a phenomenon that happens when molecules move randomly and results in a net movement of matter from a high concentration area to a low concentration area. The scent of a flower that swiftly fills a room's quiet air is a common illustration.
Thermal energy is transferred or diffused from a higher to a lower temperature through the process of heat conduction in fluids. In order for a nuclear reactor to function, neutrons must diffuse through a material that frequently scatters them but only sometimes absorbs them.
It is discovered that the concentration gradient is proportional to the rate of flow of the dispersing material. If c is the substance's concentration, x is perpendicular to this reference area, and D is the constant of proportionality, then j = D(dc/dx); dc/dx is the rate of growth of concentration in the direction x, and the minus sign denotes that the flow is from higher to lower concentration. The diffusivity, or D, controls the rate of diffusion.
Therefore, the correct option is B.
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8. The organism that usually benefits in parasitism
Answer:
The correct answer is - parasite.
Explanation:
In the symbiotic relationship of where one of the symbiotic partner get benefited in the symbiosis and other partner harmed is known as the parasitism.
In this parasitism symbiotic relationship, the organism harmed called the host while the other partner that gets benefited from the parasitism is termed parasite.
Identify the Kingdom:
Eukaryotic
Nucleus
Multicellular
Cell Wall
Chloroplasts
Autotrophic
a) Fungi
b) Protista
c) Animalia
d) Plantae
e) Archaebacteria
f) Eubacteria
Answer:
b portista
Explanation:
where are the heaviest elements found on the periodic table?
Answer:
hope it helps
Explanation:
The heaviest element found in any appreciable amount in nature is uranium, atomic number 92. (The atomic number refers to the number of protons in an atom's nucleus.) Beyond that, scientists must create new elements in accelerators, usually by smashing a beam of light atoms into a target of heavy atoms.
How are functional MRI machines being used to determine the function of different parts of the brain?
Answer:
Magnetic resonance imaging (MRI) is a technology that produces 3D images in order to assess brain activity, which is used in the diagnosis, monitoring and treatment of diseases
Explanation:
Magnetic Resonance Imaging (MRI) is a non-invasive method that generates three-dimensional (3D) images which are used for diagnostics and disease monitoring. MRI is useful to distinguish between white and grey matter in the brain, and thereby this technique can be used for the diagnosis of tumors and aneurysms which are caused by weakness in the arterial walls. Moreover, MRI is also useful to analyze the relationship between regions of the brain and cognitive processes by monitoring the neurological-psychophysiological status of an individual.
Cloning ____?
1. Results in offspring that is genetically identical to its surrogate mother.
2.Removes the nucleus from an egg call and replaces it with the nucleus from another organism.
3.Creates offspring with a combination of traits from two organisms.
4.Can only be done with simple cells like bacteria.
What two factors cause an increase in the population size?
Answer:
The amount of resources available: food and space
Answer:
health/care access to health care /medical techonlogy ability to fight or prevent disease.
Explanation:
factors that influence human population
Stickleback fish are found in both marine and freshwater habitats. The marine fish have no scales but have hardened, armorlike plates along their sides. The plates are thought to protect sticklebacks from certain predators. In the late 1980s, sticklebacks from a marine population colonized Loberg Lake, a freshwater lake in Alaska. Starting in 1990, researchers sampled fish from the lake every four years and recorded the armor-plate phenotypes of the male sticklebacks in each sample. The armor-plate phenotypes were categorized as either complete (plates extending from head to tail), partial (plates extending from head to abdomen), or low (a few plates near the head only). The results are shown in the table below. ARMOR-PLATE VARIATION IN THE STICKLEBACK POPULATION OF LOBERG LAKE Year 1990 1994 1998 2002 2006 Percent of Males in the Sample with Each Armor-Plate Phenotype Low Partial Complete 1% 2% 97% 45% 14% 41% 58% 16% 26% 76% 15% 9% 90% 6% 4%
14. Which of the following is an independent variable in the investigation?
(A) Year in which the sample was collected
(B) Salinity of the water in Loberg Lake
(C) Size of the stickleback population
(D) Percent of males with each armor-plate phenotype
15. To evaluate the reliability of the results, it would be best to know which of the following?
(A) The surface area of Loberg Lake
(B) The number of males in each sample
(C) The average daily temperature of Loberg Lake
(D) The age of the sticklebacks in each sample
Answer:
14. Which of the following is an independent variable in the investigation? (A) Year in which the sample was collected
15. To evaluate the reliability of the results, it would be best to know which of the following? (B) The number of males in each sample
Explanation:
Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter. In the exposed example, the Year in which the sample was collected is an independent variable.Probably the year in which the sample was collected is not the cause of phenotypes differentiation between males, but it is a variable that reflects the change of armor-plate through the years. With this information, scientists can make assumptions and reach a conclusion about the phenotypic variation of the trait in sweet water through the years.
The sample size is very important during a scientific investigation. The correct sample size depends on the investigation project. We need to study a correct amount of individuals to obtain conclusive and reproducible results or, on the contrary, the results will not be informative or robust at all. When sampling wild animals, many times it is difficult to obtain the ideal number of individuals, especially in aquatic animals that are hard to reach, so we have to manage with the amount that we are able to get. However, if we are working with a few individuals, or the samples are not comparable in size with each other, it is very important to consider this in the discussion and conclusions of your work. The risk with small-sized samples is that we might be studying individuals with extreme phenotypes that are not representative of the whole population. This is why it is important to get a certain number of animals, to analyze those that are most representative, and eliminate the outliers.In the exposed example, per sample, we need to get approximately the same amount of male fishes to perform a reliable comparison between years and the phenotypic changes in time.
Answer:
14. A
15. B
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Please help with this question ASAP
The island spotted skunk and the island fox are both predators of the island
deer mouse (the prey). How could these two predators establish different
niches and still prey upon island deer mice? *
A. the island spotted skunk hunts at different times than the island fox
B. the island spotted skunk hunts in the same area as the island fox
C. the island fox eats only cherries instead of deer mice
D. the island deer mice swim to a different island to avoid predators
Answer:
I think the answer is A because if they hunt at the same time they will kill themselves
Insulin is a O nucleotide O protein O pigment amino acid
Answer: protein
Explanation: I just had this question :)
If the direction of the net force acting on an object is opposite to the direction of movement, the object will speed up.
True
False
Describe this rock and record your observations. Some things to think about are shape, size, structure and color.
Answer:
It looks like a large rock with a yellowish color, and there are multiple smaller rocks inside the outer core.
Explanation:
Describe the special relationship God designed between plants and animals. Use complete sentences and proper grammar.
Answer:
https://answersingenesis.org/biology/plants/
Explanation:
This should help!
Explain how it is known that the environment changed over time.
Answer:
erosion
Explanation: