How is vitamin d linked to natural selection? which skin tone allows someone to maintain the recommended level of vitamin d?

Answers

Answer 1

According to the natural selection concept, lighter skin colour is developed to maximize vitamin D synthesis.

What is the connection between skin colour and vitamin D?

Compared to skin that is less pigmented, skin pigmentation, or melanin, absorbs the UVR that starts vitamin D synthesis, lowering the amount of vitamin D produced for a given exposure.

Why does lighter skin produce more vitamin D?

UV rays can be absorbed more effectively by lighter skin. This aids the body's ability to manufacture more vitamin D for functions like calcium development. People with a fair complexion who live in areas with lots of sunlight and close to the equator are more likely to experience folate deficiency.

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Related Questions

plz help how are theravada and mahayana different?​

Answers

Answer: Mahayana Buddhists believe they can achieve enlightenment through following the teachings of the Buddha . ... Whereas Theravada Buddhists strive to become Arhats and gain freedom from the cycle of samsara, Mahayana Buddhists may choose to stay in the cycle of samsara out of compassion for others.

Explanation:

I think they are different colonies

What was the purpose of the English Bill of Rights?
A. To limit the power of the British monarch
B. To weaken the role of Parliament in sharing power with the King
C. To establish the British cabinet system to advise the King
D. To reinstate King James II after the English Revolution

Answers

Answer:

In general, the Bill of Rights limited the power of the monarchy, elevated the status of Parliament and outlined specific rights of individuals. Some of the key liberties and concepts laid out in the articles include: Freedom to elect members of Parliament, without the king or queen's interference.

Explanation:

Hopefully  that helps

what happened to the Little Rock 9

Answers

Answer:

They had to huddle in a area that looked barely noticeable. They found this empty building only to find themselves in a kids place called Chesters kidzone

Explanation:

An economic model which the laws of supply and demand determine what is produced and consumed and at what cost

Answers

Answer:

The law of supply and demand is a theory that explains the interaction between the sellers of a resource and the buyers for that resource. The theory defines the relationship between the price of a given good or product and the willingness of people to either buy or sell it. Generally, as price increases people are willing to supply more and demand less and vice versa when the price falls.

Explanation:

what is the meaning of VIP​

Answers

Answer:

very important person

EXPLANATION:

A very important person or personage (VIP or V.I.P.) is a person who is accorded special privileges due to their high social status, influence or importance.

to do this, you'd better use a condom." He agrees. b. A famous boxer serves as a judge at a beauty contest. After the contest, he invites an 18-year-old contestant to his hotel room. She meets him there. Later, she says he forced her to have sex.​

Answers

Answer:

is this a true story?

Explanation:

it better not be

What is a joint family system?? Write it's advantages​

Answers

Answer:

Joint family, family in which members of a unilineal descent group (a group in which descent through either the female or the male line is emphasized) live together with their spouses and offspring in one homestead and under the authority of one of the members.

Unconditional love. – Having more than your usually 3-4 members in a household gives you the extra dose of unconditional love and support. ...

Family Vacations. – ...

Responsibilities. – ...

Sharing is caring. – ...

Finances. – ...

Security. – ...

Emergencies. – ...

Relationships. –

What continent is not shown on either of these globes?

Answers

The entire continent of Antarctica is shown on the globe but not on the map. Emphasize that the globe is the true shape of the Earth.
Also what the person said!

How did French support of the American Revolution increase problems for King Louis XVI?

It accelerated the economic crisis.
It introduced new ideas regarding branches of government.
It helped prove that monarchs could no longer exist.
It showed that a rigid class structure was dangerous.

Answers

Answer:

the correct answer would be A. It accelerated the economic crisis

The French support of American Revolution brought economic crises during the reign of King Louis XVI.

What is American Revolution?

American Revolution serves as colonial opposition to British attempts to impose greater control over colonies.

It was a political revolution to make British pay for what they did during the French and Indian War in 1754.

However, this revolution was supported by French which made them to experience war that affected their economy.

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what is a responsible government?​

Answers

Answer:

Responsible government is a conception of a system of government that embodies the principle of parliamentary accountability, the foundation of the Westminster system of parliamentary democracy.

Explanation:

Explanation:

Responsible government is a conception of a system of government that embodies the principle of parliamentary accountability, the foundation of the Westminster system of parliamentary democracy

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John Calvin and his followers transformed the city of Geneva into an autocracy. a democracy. a plutocracy. a theocracy.

Answers

Answer:

a theocracy.

Explanation:

John Calvin, born as Jehan Chauvin in 1509 was a French Reformer who greatly attributed to the Protestant reform movement during the 16th century. In an attempt to escape from the acquisition of the Catholic Church, he moved to various countries and there he spread his teachings and reforms.

Geneva was one among those places where he had a strong premise. There he and his followers gained religious authority over the city. Calvin more or less turned into a religious dictator of the Protestant movement.

He and his followers followers transformed the city of Geneva into a theocracy where police and church guards could enter into people’s houses to inspect if people were following Calvin’s teachings. Anything related with Catholicism was also completely forbidden in the city.

Answer: The answer is D

Explanation: A theocracy.

metamorphic igneous sedimentary
rocks contain a variety of different rock
particles that are cemented together.
2.
rocks are formed when rocks are
changed by heat and pressure.
rocks are
3. When volcanoes erupt,
typically formed.
CA
barn on this alidol
Pear Deck Interactive Slide

Answers

Answer:

1. Sedimentary   2. Metamorphic   3. Igneous

Explanation:

Havar bought a car for 3500 and later sold it for 3150 . what percentage loss did havar make ?​

Answers

Answer:

mmmmm aheinsueiw lsiehhw mKskfjke

In a short paragraph, summarize what you learned about the United States. \


pLEASE I need It

Answers

I need more details can u put what it was talking about Ik the United States but what about it

2) What is something that federal taxes pay for?
Schools
Police
O Teachers
Military
Fire department

Answers

Answer:

police

military

fire department

How do the scientific method and ethical research work together?

Answers

Answer:

Explanation:

Organizing principles, including laws, theories and research hypotheses, give structure and uniformity to scientific methods. Concerns for conducting ethical research are paramount.Researchers assure that participants are given free choice to participate and that their privacy is protected.

Answer:

Organizing principles, including laws, theories and research hypotheses, give structure and uniformity to scientific methods. Concerns for conducting ethical research are paramount. Researchers assure that participants are given free choice to participate and that their privacy is protected.

Explanation:

In my studies, I emphasized the importance of studying society through understanding
the meaning individuals attach to their own actions. Who I am?
A. Charles Wright Mills
B. George Herbert Mead
C. Max Weber
D. Karl Marx

Answers

The correct answer is C.Max Weber

Based on the quote the individual will be named Max Weber. Thus the correct option is C.

What is Inference?

Inference in any literature piece refers to achieving the conclusion of any subject with the support of facts and evidence present in the particular piece of literature and helps in understanding.

According to Weber, it was necessary to comprehend the meaning that the individual connected to the action in order to determine its reason. He identified two different kinds of comprehension.

According to Max Weber's conflict theory, there are three main categories of conflict: political, social, and economic. It places a strong focus on a dialectical reading of history and a dialectical approach to analysis.

Therefore, option C  Max Weber is appropriate.

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Which statement about economic resources is CORRECT? A. Economic resources include only money. B. Economic resources include land, capital, entrepreneurial ability, and labor. C. Economic resources exist only at the individual level. D. Economic resources are always controlled by the government.

Answers

Answer:

B. Economic resources include land, capital, entrepreneurial ability, and labor.

Explanation:

Economic resources also known as factors of production can be defined as the fundamental building blocks used by individuals or business firms for the manufacturing of finished goods and services in order to meet the unending needs and requirements of their customers.

The four economic resources (factors of production) are;

I. Land: this refers to the natural resources and raw materials extracted from the ground or grown in the soil e.g oil, gold, rubber, cocoa, etc.

II. Labor (working): this is the human capital or workers who are saddled with the responsibility of overseeing and managing all the aspects of production.

III. Capital resources: it includes the physical assets used for production of goods and services such as equipment, money, plant, etc.

IV. Entrepreneurship: it is intellectual capacity required to drive a business and the skills to develop an idea into a money making venture (business).

Hence, the statement about economic resources which is correct is that economic resources include land, capital, entrepreneurial ability, and labor.

Answer:

B. Economic resources include land, capital, entrepreneurial ability, and labor.

Explanation:

!!!!HELP ASAP I AM IN THE MIDDLE OF A FINAL EXAM!!!!!!!!!!

By 2016, how much was the United States spending per hour for the total cost of all of the wars being fought?

Eight hundred thousand
Eight million
Eight billion
Eight trillion

Answers

Answer:  eight million

Explanation: i looked it up and its giving between 2 - 10 million an hour depending on each specific subdevision of war costs

By 2016, Eight hundred thousand per hours the United States spending for the total cost of all of the wars being fought.

The United States has been involved in many wars starting from South America, Europe and moving towards Asia.After coming out of isolationism as part of foreign policy, the United States got involved in World Wars in Europe.After World Wars, America got involvement in Asia as it stand against communism.Involvement in Korean War and Vietnam War to remove communism in these countries.

Therefore we can conclude that Eight hundred thousand the United States spend per hour.

Thus option A. is correct answer.

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When Ruby practice piano she gets a sticker, and when she does a chore
she gets 2 stickers. When she has 20 stickers her parents will buy her a
pizza as reward. This system is called?

Answers

Answer:

A reward system.

Explanation:

My parents use this system all the time and they say that it is called a reward system.

¿Por qué crees que son importantes los organismos de protección de los derechos humanos en situaciones de conflicto armado como el de nuestro país?

Answers

Answer:

por qué con los derechos es más difícil q te puedan hacer algo para eso sirven los derechos y deveres

Sam stop the car to tales a picture. ​

Answers

Answer:

why did Sam stop the car to take a picture, lol

Explanation:

v The creation of the IRS

An Enumerated Power
An Implied Power
A Denied Power
A Concurrent Power

Answers

I think it’s an implied power

The New York Times newspaper has an article about a corrupt deal between a Congressperson taking bribes from a corporation’s executives that want a law made to help their business. Is this article protected by the First Amendment? Yes or no and why?

Answers

Answer:

Yes, this article is protected under the Fisrt Amendment.

Explanation:

The First Amendment of the US Constitution emphasizes on the provisions of freedom of speech and freedom of the press. It provides the citizens and institutions of the country to express themselves in public without any restrictions.

The New York Times newspaper publishing an article about a corrupt deal between a Congressperson taking bribes from a corporation’s executives will be protected under the First Amendment. This is because the Constitution gives the right to individuals and press to express and publish information to address their concerns and grievances.

A Congressperson taking bribes is both a constitutional and public concern, therefore the New York Times newspaper has the right to publish an article about it.

This country is part of Africa, but is often considered part of the Middle East

Answers

Answer:

Turkey is sometimes considered part of the Middle East, sometimes part of Europe. Sometimes the Middle East includes North Africa as well. Afghanistan, Pakistan, India, and Bangladesh are usually described as South Asia.

Which countries are parliamentary democracies? Select all that apply.
A.
India

B.
China

C.
Japan

D.
North Korea

E.
South Korea

Answers

Answer:

I think the answer should be c

What happened to Jackson in the Election of 1824?

Answers

Answer:

While Andrew Jackson won a plurality of electoral votes and the popular vote in the election of 1824, he lost to John Quincy Adams as the election was deferred to the House of Representatives.

Explanation:

what is the difference between the two types of experimental research design?​

Answers

Experimental studies involve random assignment; quasi-experimental include one or more comparison groups, but not random assignment.

The difference between the two types of experimental research design are the true experiments and the Quasi-experiments.

What is research?

The term “research” refers to generating and creating new ideas with the help of previous studies and phenomena. Using primary valid sources that have already been published on a subject that is related, For example, journals, articles, population data, and historical events are based.

According to the research, the research was to define the research experiments. True experiments and quasi-experiments are the two categories of experimental study. The genuine experiment is that people in the sample are randomly allocated to either the treatment or the control group. The quasi-experiments are diametrically opposed to those not assigned at random.

As a result, the difference between the two types of experimental research design are the true experiments choose randomly and the Quasi-experiments not choose the randomly.

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detailed features of ed dur

Answers

Answer:

First unearthed by the Iraqi archaeological team in 1973, the fort at Ed-Dur was undoubtedly the focus of political power. Four walls some 20 metres (66 feet) in length connect four towers, each some 4 metres (13 feet) in diameter. The fort was constructed mainly from beach rock. South of the fort is the Sun Temple.

Location: Umm Al Quwain, the UAE

Area: 5 km2 (1.9 sq mi)

Founded: c. 1894 BCE

Part of: Umm Al-Quwain

Why were the Know -Nothings considered a nativist party?​

Answers

Answer:

Members, when asked about their nativist organizations, were supposed to reply that they knew nothing, hence the name. As its membership and importance grew in the 1850s, the group slowly shed its clandestine character and took the official name American Party.

hopes this helps

Explanation:

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ou buy a 10-year $1.000 par value 4.60% annual-payment coupon bond priced to yield 6.60%. You do not sell the bond at year end. If you are in a 15% tax bracket, at year-end you will owe taxes on this investment equal to Multiple Choice $9.90 $5.32 $8.48 O How many peaks will each of the following molecules show in its proton NMR spectrum in order from left to right? CH3 CH "CH3 Br CH3 3,2,2 2, 2, 3 O 2,3,2 3,2,3 Complete the code in the parts indicated for the Selection sort method.Write any additional helper methods needed. public static void selectionSort(int[] numbers) { int minIndex; for (int i=0;i 3. Calcium phosphate (Ca3(PO4)2) has the solubility product Ksp 2.07x10-33. For the study of a calcium dependent enzyme, a biochemist is considering to prepare a 0.1 M phosphate buffer pH 7.5, which is also 10 mM with respect to CaCl2. Is it possible to prepare such a buffer ? Reason your answer by a calculation Consider a deep neural net applied to decide between the following four categories: cat, tiger, human face, lion The neural net uses a softmax unit at the output layer. Consider the case where the values fed into the output layer are:cat 0.5 tiger 0.8 human face -3 lion 0.6The softmax converts these values into a probability vector.1. Compute the probabiity vector.2. Which outcome is the most likely?3. Which outcome is the least likely?4. What is the result of cross-entropy cost function if the target output is lion? if you had the choice to give a transplant to a successful older man or a young drug addict, who would you choose? Amera is discussing the movement of water molecules. What word describes what high temperatures do to water molecules? A. expand B. constrict C. convert D. react 5. was energy conserved during the motion of your pendulum? if not, list some possible ways energy could have been lost from the pendulum system, making sure to use complete sentences. Determine x and x from the given parameters of the population and sample size.=68 =20 n=29 performance standards tell employees in advance what level of performance is expected of them.True or False 1. A 20 Ohm resistor and a 5 Ohm lamp are connected in a single path, with a 50 amps.What type of circuit is this:What is the total resistance of the circuit?What is the total voltage in this circuit?What is the current? Information systems just refer to computer-based tools used to support the needs of an organisation? True or false The absolute value of the shadow price indicates the amount by which the objective function will be a. improved if the corresponding constraint is loosened. b. made worse if the corresponding constraint is loosened. c. improved if the corresponding constraint is unchanged. d. improved if the corresponding constraint is tightened. Which of the following statements describes the Federal Restro's polley under the ample reserve regime? (Stewat all that apply) The discount rate acts as an upper cap on the Federal Funds rato The interest rate on reserves acts as a lower bound on the Federal Funds rate, Tho Federal Reserve uses open market operations to shift the supply curve of reserves. The Federal Reserves uses open market operations to shift the demand curve for reserves. when will sees other people crying, he cries too, and when he sees someone who is embarrassed, he feels embarrassed. will would likely receive a high score on a measure of: true/false. a mac user wants to update macos and is searching to locate update files. What issues could arise with this person having knowledge about the tucks? 2. how would you define bi? identify and briefly discuss a real-world application of bi that you recently experienced. Consider M bandpass signals in the form sm(t) = ReAmg(t)el2rt of where Am's are arbitrary complex numbers and g(t) is a real lowpass signal with energy Eg. a. What are the lowpass equivalent signals of sm(t) with respect to fo? b. Give an orthonormal basis for the lowpass equivalents of sm(t). Write the lowpass equivalents in terms of the orthonormal basis. c. Give an orthonormal basis for Sm(t)'s. when 5.22 g of no2 was reacted with excess water, 3.57 g of hno3 was obtained. what was the percent yield? 3 no2(g) h2o(l) 2 hno3(aq) no(g)