Why Are People Different Colors? Nina Jablonski, a biological rainbow of human skin color." She knew that our closest primate relatives have pale skin under dark fur, but human skin comes in a variety of shades from pinkish white to dark brown. How did this variation arise Many biological traits have been shaped by natural selection, Could human skin color be one such trait? If so, she would have to find the selective pressure that caused different populations to evolve varying levels of skin pigmentation. at Penn State University, spent many hours chinking about 'the sepia You will now meet Nina in a short five-minute video (https://www.hhmi.org/biointeractive/biology-skin-color). She will take you on a journey that she undertook in the pursuit of this question. After you have viewed the video, answer the following five questions. Questions 1. Describe the conditions necessary for evolution by natural sclection to take place in a population. 2. With regard to the evolution of skin color in humans, which of these conditions is Nina sure about (and why) and which one(s) is she investigating? 3. What is Nina's likely hypothesis about the evolution of skin color in humans? 4. How might she test her hypothesis?

Answers

Answer 1
Melanin is the reason why people are different colors.

Related Questions

What are three body systems of a chick that work together to maintain homeostasis?

Answers

Answer: Chickens are prepared to keep warm by their feathers, the scales on their feet and their fat reserves. Wild chickens may build a nest if they get too cold.

5th grade ,. will help

This street is built in a zigzag pattern. Tell why this design makes it easier for cars to move up the hill.

Answers

this design makes it easier for cars to move up the hill because its moving more so it makes it easier to get up the hill
it is moving more which makes it easier for cars to go up faster

What is the crop plant that is suitable for this biofertilizer? Please elaborate.

Answers

Answer:

In nature, there are a number of useful soil micro organisms which can help plants to absorb nutrients. Their utility can be enhanced with human intervention by selecting efficient organisms, culturing them and adding them to soils directly or through seeds. The cultured micro organisms packed in some carrier material for easy application in the field are called bio-fertilisers. Thus, the critical input in Biofertilisers is the micro organisms.

Answer:

leguminous crops (In case it's Rhizobium inoculant )

Explanation:

Rhizobium inoculant is used for leguminous crops. Azotobacter can be used with crops like wheat, maize, mustard, cotton, potato and other vegetable crops. Azospirillum inoculations are recommended mainly for sorghum, millets, maize, sugarcane and wheat.

Antibiotics significance

Answers

Answer:

To detox or get away of all the fluids that may affect your skin by pimples and staff.

Which statement describes the role of flowers in plant survival?

Answers

Answer:

D. Flower contain cells that produce gametes.

Answer: D. Flowers contain cells that produce gametes

Explanation:

I got it right on a quiz

A writer wants to make the following claim: Summer holidays should be restored to times when families took off work and school together. Which answer makes the most logical and precise counterclaim? We have always enjoyed summer holidays in my family, and that shouldn't be something anyone does differently. My family takes a vacation at a different time of the year, and we believe that summer is a bad time for vacations. Many families need the months of summer to focus on completing work or school in order to progress in their careers. There are too many people who feel entitled to three months off during the summer months, when there is no good reason. Question 11(Multiple Choice Worth 5 points)

Answers

Many families need the months of summer to focus on completing work or school in order to progress in their careers.

Explanation:

Assuming the choices are:
1. We have always enjoyed summer holidays in my family, and that shouldn't be something anyone does differently.

2. My family takes a vacation at a different time of the year, and we believe that summer is a bad time for vacations.

3. Many families need the months of summer to focus on completing work or school in order to progress in their careers.

4. There are too many people who feel entitled to three months off during the summer months, when there is no good reason.

A counterclaim would be claiming that summer holidays don't need to be restored to times when families took off work and school together. The first choice isn't really presenting a 'why' towards the counterclaim. The second choice doesn't really have to do with summer holidays, as it's claiming that summer isn't a good time for vacations. The fourth choice...self explanatory.   (no sound reasoning). This leaves the third choice, which gives a logical reason (using those three months to progress careers and focus on school).

4 the equilibrium of the intersections equal the Herodotus of the sequential

Ms. Bronner is a second-grade teacher. Each day, students in Ms. Bronner's class can earn marbles that get added to a jar for following all of the classroom rules. Once the jar gets filled to the rim with marbles, the class gets to choose whether they want to have an ice-cream party or a game day at school. Ms. Bronner is using _____ to encourage rule-following in her classroom.

in vivo exposure
participant modeling
aversive conditioning
a token economy

Answers

We can confirm that Ms. Bronner is using a token economy to encourage the rule-following in her classroom.

What is a token economy?

This is a method of positive conditioning in which a token of some sort is given as a prize to reinforce positive behavior, with the idea that these tokens may then be exchanged for even greater reinforcers once a certain level is reached.

Therefore, we can confirm that since the methods being described in the questions perfectly correspond to this definition, Ms. Bronner is using a token economy to encourage the rule-following in her classroom.

To learn more about the token economy method:

https://brainly.com/question/17465339?referrer=searchResults

What is the role of cartilage in the rib cage?

Answers

Answer:

The costal cartilage connects the ribs to the sternum. Costal cartilage normally allows forward movement of the ribs, providing flexibility to the chest wall. There are usually 12 pairs of cartilage associated with the rib cage.

please consider as brainlest if useful

ANSWER: the costal cartilage connects the ribs to the sternum. Costal cartilage normally allows forward movement of the ribs, providing flexibility to the chest wall. There are usually 12 pairs of cartilage associated with the rib cage.

suppose that out of 10 trees planted in a yard only five survived. what kind of hypothesis could make about this observation for event.​

Answers

Answer:

The 5 trees that did not live couldn't receive nutrients as well as the others.

Explanation:

A hypothesis doesn't have to be a perfect statement, it is mainly a scientific guess that is further taken to the experimental level and research level. Your answer could consist of anything as long as it makes logical sense.

Answer:

Hypothesis: The yard doesn't have suitable environmental conditions necessary for the plants to live, that's why only half of the trees survived.

Why can't grass eat rabbits? (and I actually mean that)

Answers

Answer:

Are grass clippings from the lawn mower safe? You should never feed your bunny grass cuttings from lawn mowers. According to The Rabbit House, the heat of the blades and the cutting process causes changes to the grass making it ferment quicker leaving your bunny vulnerable to a poorly tummy.

Answer:

Grass can't eat rabbits because simply plants are producers and not consumers and they make their own food by photosynthesis, while rabbits are primary consumers, depend on plants to get their food and stay alive. Plants are at the lower trophic level of the food pyramid and are said to be the beginning of every food chain.

Brown bears and polar bears are examples of:

A. Co-evolution
B. Convergent
C. Divergent evolution
D. Parallel Evolution

Answers

Answer:

co- evolution is the correct answer of given statement

Draw two snapshots, take a photo, and attach the photo here. 1) Draw a 2n=6 cell undergoing anaphase 2) Draw a 2n=6 cell undergoing anaphase I​

Answers

Answer:

Draw two snapshots, take a photo, and attach the photo here. A) Draw a 2n=6 cell undergoing anaphase. B) Draw a 2n=6 cell undergoing anaphase I.

Explanation:

i dont kno lol

Wood is an expamle of a natural resource

Answers

Answer:

This statement is TRUE.

This natural resource is one of the few that you can renew.

Explanation:

Hope this helps.

Pls give branliest.

this statement is true

Please help me solve it

Answers

Answer:

ionic

Explanation:

I don't know how to explain this

While making her morning rounds, zoologist Martina takes a quick peek into the pen that houses Uruyange, the zoo's African gorilla. She
can tell immediately that something is wrong and alerts other zookeepers to help her get Uruyange in for an examination. Which sentence
BEST explains how Martina was able to recognize that something was wrong?

O A.
Uruyange most likely told Martina how he was feeling with sign language.
O B.
Martina spotted Uruyange's toys thrown into the pond in his enclosure.
Oc.
Martina had no real way of knowing something was wrong, she just felt it.
OD.
Uruyange may have been slumped over in his pen or behaving erratically.

Answers

Answer:

D

Explanation:

it makes sense that D is the answer since it shows something was actually wrong

What was likely the purpose of the Great Enclosure?
A. To keep slaves and workers from escaping
B. To separate the wealthy from the poor in society
C. To enclose cattle and horses
D. To protect Zimbabweans from outside invasion

Answers

Answer:

B.

Explanation:

(^-^)

which could be a primary source of energy in a food web?

Answers

Answer:

The plant which I think it says clover i can see

Explanation:

plants are primary sources of energy because it makes it own food and doesn't take form other animals.

Write one to two paragraphs about the key points in either social constructionist or essentialist views about gender.

Answers

Answer:

Simply put, essentialist feminism argues that gender is decided at birth because of physical differences, while constructivist feminism argues that gender is socially constructed through conditioning orchestrated by the patriarchy.

Explanation:

please consider as brainlest if useful

what is the figure of speech used for the stars were as bright as jewels.​

Answers

Answer:

it a simile :)

two students are working on building a birdhouse student 1 applies 10 n to a wooden board in order to slide it across the table

Answers

Answer:

10N to the right

Explanation:

Could someone please do this for me
.

Answers

Answer:

So you take the second disk (sunlight [tex]*[/tex] [tex]\sqrt{\frac{distance}{radius} }[/tex]) and put it on the other side.

no im just trolling. i dont know.

Where are pesticides found in the environment?

A. In the soil only
B. In the water only
C. In the air only
D. Everywhere/ all of the above

Answers

It is d because pesticides run off into water, they are absorbed into soil , and they are left in the air , hope this helps :)

Which blood vessel, the mesentery artery, the hepatic portal vein, or the hepatic vein contains the most glucose after eating?​

Answers

Answer:

Hepatic portal vein

Explanation:

It’s multiple-choice I just need the answers please

Answers

Answer:

1. 2

2. 1

3. 1

4. 2

5. 4

Explanation:

If you start with 1000 g of Carbon 14, how much will remain after 4 half lives?

Answers

Answer:

A half life is the amount of time it takes for there to be half of your original amount.

5730 years is the half life for carbon 14 (it's not important to your question. But it does help understand it more).

So, if you start with 1000 grams. After 5730 years, you will only have half of that.

Then after 5730 more years, you will have half of the halved amount. Do you see the pattern?

Hope this helps.

you gotta work on your phone

Answers

Answer:

I’m working on tablet and phone

Explanation:

The eggs and larvae of marine animals tend to require water with more dissolved oxygen in it than the adults do. If water flows from a freshwater source into a salt water bay, what effect would this have on the population of marine animals?

The freshwater would decrease the populations of marine animals because it would deplete the salt water of oxygen.
The freshwater would decrease the populations of marine animals by decreasing both salinity and oxygen levels.
The freshwater would increase the populations, thereby decreasing the levels of oxygen and marine animals.
The freshwater would increase the populations of marine animals because it holds more oxygen than the salt water.

Answers

Answer.The oxygen being removed.

reason. The larvae and eggs need more water reducing oxygen.

Answer:

Its D.

Explanation:

The freshwater would increase the populations of marine animals because it holds more oxygen than the salt water.

A woman with a blood type of A and a man with a blood type of B have a child with a blood type of AB. The AB blood type is an example of

Answers

The AB blood type is an example of codominance. It is a type of genetic interaction where both alleles are expressed.

What is codominance?

In genetics, codominance refers to the expression of two gene variants or alleles for the same gene locus in the same individual.

Codominance leads to the expression of a phenotype that is different from homo-zygous individuals.

In conclusion, the AB blood type is an example of codominance, which represents a type of genetic interaction where both alleles are expressed.

Learn more about codominance here:

https://brainly.com/question/3578928

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What are the different climates in this world? 

Answers

Answer:

one of five classifications of the Earth's climates: tropical, dry, mild, continental, and polar.

one of five classifications of the Earth's climates: tropical, dry, mild, continental, and polar.

Carbohydrates are found in many foods. What is the end result of the body’s use of a carbohydrate?

Answers

Answer:

Used for energy

Explanation:

After eating carbohydrates, the body breaks it down into Glucose, which goes through many catabolic pathways such as Glycolysis, PDH and the Kreb's cycle. The end result is primarily the formation of ATP, which is used as energy throughout the body.

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