You are studying three populations of an endangered species of toad that used to be common in the California central valley. Global warming has caused this species to retreat to higher elevations in recent decades where it stays cooler; the toad used to be found throughout the valley, but is now restricted to the tops of three mountains. Historical records indicate that there used to be hundreds of thousands of toads in the central valley, but sampling the mountaintops reveals that the toad population on each is now limited to a few hundred individuals. You survey allozyme diversity at one locus on each of the three mountaintops and find that each population is fixed for a different allele of the ribbit gene: mountain #1 is fixed for the A1 allele, mountain #2 for the A2 allele, and mountain #3 for the A3 allele. The average number of baby toads born in each population is the same, and the environment on each mountaintop is very similar, as far as your data show.
Explain why each population is fixed for a different allele.
Sentence 1: Describe the variability that was initially present in each of the populations.Sentence 2: State which individuals had the highest fitness in a given population, or why fitness is not an issue if that is your conclusion.Sentence 3: Explain what evolutionary force acted on the population(s), and why and how it acted.Sentence 4: Describe how the populations evolved in response to their changing environment. Be as specific as you can (e.g., say "increased" or "decreased", rather than just "changed".)

A person who conducts research on psychological disorders is a clinical scientist.

An expert in mental health who studies psychological problems is known as a clinical scientist.

They typically hold a Ph.D. or PsyD in psychology, and they might additionally have training in research techniques.

They also use scientific techniques to plan and carry out research, gather and examine data, and increase our understanding of mental health.

In order to improve our knowledge of psychiatric diseases and create evidence-based interventions, clinical scientists frequently collaborate with other professionals in academic and research contexts.

Therefore, C) clinical scientist is the correct answer.

Learn more about clinical scientists here:

https://brainly.com/question/32403384

#SPJ1

Answer

Video experimento: Indicio de fotosíntesis

busca en you tube

Answer:

The nerves of the arm and hand perform a substantial two-fold role: commanding the intricate movements of the arms all the way down to the dexterous fingers, while also receiving the vast sensory information supplied by the sensory nerves of the hands and fingers. The movements of the arms must be fast, precise, and strong to complete the diverse activities the body engages in throughout the day.

Explanation:

Answer:

Receptors, spinal cord, nerves, thalamus, sensory cortex

Explanation:

When you touch an object the Touch receptors receive the stimulation. The impulse from this travels to the Spinal Cord through the sensory nerves. Those nerves come into contact with others, sending it to the thalamus and sensory cortex.

Answer:

Plants are not an example of an abiotic factor

Explanation:

Answer:

plants are living/biotic so this means it isn't abiotic. (abiotic means nonliving)

Explanation:

Answer:

age gender, marital status, race, disability and sexual transmitted infections

Explanation:

Answer:

If your talking about fitness then it's B

Answer:

A.

Explanation:

Because only plant cells have a cell wall, chloroplast, and a large vacuole.

Answer:

Explanation:

asdfasdf

Keep pushing yourself to improve, and don't be afraid to make mistakes or try new approaches. With dedication and perseverance, you can achieve your goals.

Goals refer to the specific targets or objectives that a person or organization aims to achieve within a set period of time.

Follow these steps to effectively practice and achieve your goals:

Set specific and attainable goals: Determine what you want to achieve and set specific and measurable goals to help you get there. Make certain that your objectives are both attainable and realistic.

Make a plan: Create a plan that outlines the steps you must take to achieve your objectives. Break your plan down into smaller, more manageable tasks that you can complete.

Schedule your practice sessions as follows: Schedule regular practice sessions and make them a priority in your schedule. Consistency is essential for achieving your objectives.

Prioritize quality over quantity: It is preferable to practice for a shorter period of time with a high level of focus and intensity than to practice for a longer period of time with no focus or purpose.

Thus, these are some steps to effectively practice the following to ensure the achievement of their goals.

For more details regarding goals, visit:

https://brainly.com/question/21032773

#SPJ2

Answer:

a. regenation

Explanation:

hope its hrlp

The individual is likely deficient in pyruvate dehydrogenase complex (PDH), which is responsible for converting pyruvate to acetyl-CoA, an essential step in the process of cellular respiration.

The pyruvate dehydrogenase complex (PDH) is a large enzyme complex found in the mitochondria of eukaryotic cells. It catalyzes the conversion of pyruvate, a product of glycolysis, into acetyl-CoA, which enters the citric acid cycle to produce energy through aerobic respiration.

PDH is regulated by a number of factors, including phosphorylation by PDH kinase, which inhibits enzyme activity, and dephosphorylation by PDH phosphatase, which activates the enzyme. Thiamine pyrophosphate (vitamin B1) is an important cofactor for PDH, and its deficiency can lead to reduced enzyme activity and a buildup of pyruvate and lactate, leading to lactic acidosis.

PDH is an essential component of cellular energy metabolism, and its dysfunction is associated with a number of diseases, including pyruvate dehydrogenase deficiency and Leigh syndrome.

Learn more about pyruvate dehydrogenase complex, here:

https://brainly.com/question/29312833

#SPJ1

Answer:

D

Explanation:

The fluid mosaic model got its name because the plasma membrane resembles a mosaic formed by proteins embedded in a fluid of lipids. ... In the fluid mosaic model, the plasma membrane is basically composed of a lipid bilayer in which proteins are inserted.

Answer:  Type 1 diabetes mellitus:

About 10% of diabetics have this type

A person does not produce enough insulin

Treated with insulin injections

Can lead to coma and death as built up ketones are converted to acids

Usually begins in childhood or adolescence

Long-term complications include blindness and cardiovascular disorders

Type 2 diabetes mellitus:

Most diabetics have this type

Cannot properly use produced insulin

Affects a person's ability to regulate glucose metabolism

Often develops in overweight or obese people

Long-term complications include blindness and cardiovascular disorders

Explanation: hope it helps

Type 1 Diabetes Mellitus:

About 10% of diabetes have this type

Can lead to coma and death as built up ketones are converted to acids

Cannot properly use produced insulin

Usually develops in childhood

Type 2 Diabetes Mellitus:

Most diabetes have this type

Often develops in overweight/obese people
Affects a person's ability to regulate glucose metabolism

Long-term complications include blindness and cardiovascular disorder.

Both:

A person does not produce enough insulin

Treated with insulin injections

D - The meiosis process results in the split of the cell into 4

Answer:

Repeating an experiment more than once helps determine if the data was a fluke, or represents the normal case. It helps guard against jumping to conclusions without enough evidence. The number of repeats depends on many factors, including the spread of the data and the availability of resources.

In the course of evolution, the development of the gastrovascular cavity(digestive system) with only one opening is first associated with  (e) The Cnidaria such as the jellyfish.

The gastrovascular cavity is the primary organ of digestion and circulation in two major animal phyla: the Coelenterates or cnidarians (including jellyfish and corals) and Platyhelminthes (flatworms).

The cavity may be extensively branched into a system of canals. In cnidarians, the gastrovascular system is also known as the coelenteron, and is commonly known as a "blind gut" or "blind sac", since food enters and waste exits through the same orifice.

The radially symmetrical cnidarians have a sac-like body in two distinct layers, the epidermis and gastrodermis, with a jellylike layer called the mesoglea between. Extracellular digestion takes place within the central cavity of the sac-like body.

Learn more about gastrovascular cavity to visit this link

https://brainly.com/question/8941108

#SPJ4

Remember that primary succession occurs when new land is formed or bare rock is exposed, providing a habitat that can be colonized. This colonization occurs for the first time after the land is formed.

One example of this succession is an eruption of volcanoes since as lava flows into the ocean, new rock is formed.

we can conclude that the correct answer is:

B. on an island just formed by a volcano

Of the three domains, Archaea and Bacteria are both prokaryotes, which means they don't have a nucleus. The main difference between them is that Archaea are found in extreme environments, and Bacteria have cell walls made of peptidoglycan.

On the other hand, Eukarya contains both unicellular and multicellular organisms, with cells organized in organelles.

This means the answer would be:

• A - Archaea

• B -Eukarya

• C - Bacteria.

Answer:

Explanation:

They will differ because MHC molecules of the donor may stimulate rejection of the graft tissue as opposed to a receiver rejecting it in an immune response. That is because the MHC molecules are a group of genes that code for proteins found on the surfaces of cells that help the immune system recognize foreign substances and the surfaces are what is being transplanted during a tissue graft, meaning they are the ones that will ultimately reject the tissue graft operation.

Answer: Genotype: W, w. Jess has a widow's peak since she is heterozygous for the trait.

Explanation:

A dominant trait occurs when an individual has one dominant allele (W) and one recessive allele (w), or has two dominant alleles (W, W).

Jess is heterozygous for this trait, which means she has one dominant allele and one recessive allele (W, w). W, w is Jess's genotype. Since Jess has one dominant allele, she has a widow's peak.

Answer:

Explanation:

The correct answer is b) It led to an understanding of how cancer cells divide so rapidly.

Answer:

An example of osmosis is slowly learning how to sew after sitting next to an experience seamstress. ... An example of osmosis is when red blood cells, which have a high concentration of protein and salt, are placed in a lower concentration fluid like water, the water will rush into the red blood cells.

Explanation:

The interpupillary distance can go from 58 and 72mm. It is the distance betwen your pupils.

So, in order to be able to have a good visual focus, it is nesesary that you adjust it.

Answer: The answer is 4

Explanation:

Vitamin D controls your skin pigment. It's kind of like when someone has an iron deficiency they get bruises and they turn a whiter shade.

Hope I helped :)

The factors that were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection are the impact of UV radiation on folate and Vitamin D levels in human populations.

 Ultraviolet B radiation produces diet D in human skin. Ultraviolet radiation can, however, smash folate. Folate is critical for the speedy increase of cells, particularly at some point in which its deficiency can motivate neural tube defects. The human frame additionally has a mechanism to save you overproduction of vitamins.

Ultraviolet is a shape of electromagnetic radiation with a wavelength from 10 nm to four hundred nm, shorter than that of seen light, but longer than X-rays. UV radiation is found in sunlight and constitutes approximately 10% of the whole electromagnetic radiation output from the Sun.

Thus it is learned that the above answers are well-explained factors that were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection bout.

To learn more about natural selection refer to the link :

https://brainly.com/question/23929271

Answer:

Explanation

toucans take delight in eating the eggs of smaller birds, small juicy insects, tree frogs and reptiles including lizards and snakes.

Answer:

I do believe one of my ancestors is a dairy farmer because my family has a history of farming. The old house I lived in had a fence for cows and goats. The house has been in my family for years. So that infers that there may have been goats and cows. Meaning one of my ancestors were a dairy farmer.

Explanation:

I don't know if this question has a lesson behind it and what is the main reason but ill answer the best I can.

An irregularly shaped region within the prokaryotic cell that contains all or most of the genetic material.

The two pieces of evidence that support the theory of the expanding universe are the red shift of light from distant stars and the existence of cosmic background radiation.

The correct answer is option B.

1. Red shift of light from distant stars: The observation of redshift in the light coming from distant galaxies provides evidence for the expansion of the universe. Redshift occurs when the light waves from an object moving away from an observer are stretched, causing a shift towards longer wavelengths. This phenomenon is consistent with the Doppler effect, where the wavelength of light appears to stretch as the source moves away. The redshift of light from distant stars indicates that galaxies are moving away from us and from each other, supporting the idea that the universe is expanding.

2. Existence of cosmic background radiation: The discovery of cosmic background radiation further supports the theory of the expanding universe. Cosmic background radiation is a faint, uniform microwave radiation that permeates the entire universe. It is believed to be residual radiation from the Big Bang, the initial event that is thought to have initiated the expansion of the universe. The presence of cosmic background radiation provides strong evidence for the hot, dense early stages of the universe and its subsequent expansion.

Based on the information provided in the diagram, it is not possible to determine the identity or nature of the celestial objects labeled X. The diagram only represents the expansion of the universe over time and does not provide specific details about individual celestial objects.

For more such information on: radiation

https://brainly.com/question/2375220

#SPJ8

The Moon's surface is characterized by several major features that are observable from Earth and have been studied in detail through lunar missions. Some of the prominent features of the Moon's surface include:

Impact Craters: The Moon's surface is heavily cratered due to billions of years of impacts from asteroids, comets, and meteoroids. Impact craters come in various sizes, ranging from small to enormous, and they preserve evidence of the Moon's violent history. Some well-known craters include Tycho, Copernicus, and Kepler.

Rilles: These are long, narrow depressions or channels found on the lunar surface. Rilles can be sinuous, resembling dried riverbeds, or straight. They are thought to be formed by ancient lava flows or by the collapse of underground lava tubes.

Regolith: The Moon's surface is covered by a layer of loose, fragmented material known as regolith. It is composed of fine dust, small rocks, and larger boulders. The regolith is a result of billions of years of impact processes and micrometeorite bombardment.

Lunar Highlands Massifs: These are large mountains or massifs found within the lunar highlands. They are formed by the uplift and compression of crustal rocks during the Moon's early history. Notable examples include the Montes Apenninus and the Montes Carpatus.

Lunar Swirls: These are unique, bright patterns or streaks seen on the Moon's surface. Lunar swirls are associated with localized magnetic fields and are thought to be caused by the interaction of the Moon's surface with the solar wind.

Lunar Maria Domed Volcanoes: These are small, rounded volcanic features found in some maria. They are believed to have formed when magma pushed up from beneath the surface but did not erupt explosively. These domes often have smooth surfaces and can be several kilometers in diameter.

for similar questions on moons surface.

https://brainly.com/question/9636132

#SPJ8