1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DanielleElmas [232]
3 years ago
10

Why is there so much variation in human skin coloration? a. This occurred because humans underwent natural selection, which resu

lted in traits that conferred advantages to humans becoming fixed in populations. b. This occurred because alleles that are harmful in one environmental context may be beneficial in another. c. This occurred because humans are found in areas that range from high-UV-light environments to low-UV-light environments. d. This occurred because skin coloration results in different advantages depending on the levels of sun in the region.e. All of these.
Physics
1 answer:
Arlecino [84]3 years ago
5 0

Answer:

<u>e. All of these.</u>

Explanation:

  • The skin in humans ranges from darkest to the lightest color, as a result of genetic makeup, exposure to the sun rays, skin pigmentation may be either due to the evolutionary process of natural selection, and it may be due to the biochemical effects of the UV rays.
  • As the pigment in the skin of humans is affected by the content of melanin in the body that causes the determination of skins cells of the darker colored humans, and the light skin is determined by the bluish-white tissues under the dermis and the hemoglobin.
  • The emergence of skin pigments dates back to 1.2 billion years ago. When the harsh climatic conditions drove the early humans into arid and open landscapes. In general, the people living near to equator have darkly pigmented than those living in poles are lightly pigmented.
You might be interested in
Government as an academic field of study ​
Savatey [412]
Government as an academic field of study is a vast subject, encompassing political institutions and political theories. ... Government allows for civil order by creating laws and protecting its citizens. In order to ensure enforcement of laws, government also creates punishments for those who break the law.
3 0
2 years ago
Read 2 more answers
Why does the sky change colors at sunset?
KiRa [710]

Atmospheric refraction is the deviation of light or other electromagnetic wave from a straight line as it passes through the atmosphere due to the variation in air density as a function of height. ... Refraction not only affects visible light rays, but all electromagnetic radiation, although in varying degrees.

So in short, the answer is D.

(My answer got deleted because it didnt explain which is dumb)

8 0
2 years ago
Read 2 more answers
When in orbit, astronauts experience weightlessness what is this caused by?
erica [24]

no gravity or dark matter

4 0
3 years ago
Read 2 more answers
A car traveling at 27.4 m/s hits a bridge abutment. A passenger in the car, who has a mass of 65.0 kg, moves forward a distance
Minchanka [31]

Answer:

F=43570.9N

Explanation:

We can calculate the acceleration experimented by the passenger using the formula v_f^2=v_i^2+2ad, taking the initial direction of movement as the positive direction and considering it comes to a rest:

a=\frac{v_f^2-v_i^2}{2d}=\frac{-v_i^2}{2d}

Then we use Newton's 2nd Law to calculate the force the passenger of mass m experimented to have this acceleration:

F=ma=\frac{-mv_i^2}{2d}

Which for our values is:

F=\frac{-(65kg)(27.4m/s)^2}{2(0.56m)}=43570.9N

6 0
3 years ago
What is the mass, in grams, of a pure iron cube that has a volume of 3.70cm cubed?
Arlecino [84]
To determine the amount in grams of the iron, we need data on the density of iron. From literature, it has a value of <span>p=7.9 g/cm3. We simply multiply the volume to the density. We do as follows:

mass = 3.70 (7.9) = 29.23 g Fe

Hope this answers the question. Have a nice day.</span>
7 0
3 years ago
Other questions:
  • A material you are testing conducts electricity but canot be pulled into wires
    10·1 answer
  • Constructive interference results in a wave with a _______________ amplitude than any of the component waves.
    13·2 answers
  • My Notes The linear density rho in a rod 5 m long is 11/ x + 4 kg/m, where x is measured in meters from one end of the rod. Find
    11·2 answers
  • The air sealed between two panes of glass in some windows helps to _____.
    5·2 answers
  • HELLPPP ASAPPPP!!!!!
    12·1 answer
  • To make yourself some coffee, you put one cup of water (246 gg ) in a small pot on the stove. Part A What quantity of energy mus
    11·1 answer
  • Calculate the momentum of a 32 kg eagle diving down to the water to catch a fish. During the dive, the eagle
    10·1 answer
  • A bear fells from 10m long grass <br> From where the bear is
    11·1 answer
  • Which of the following describes the products of a chemical reaction? A. The original materials B. The substances that are chang
    10·1 answer
  • What is the x-component of the total electric field due to these two charges at a point on the x-axis?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!