Which component of skin protects against UV light?(1 point)

Question

Responses

melanin
melanin

epidermis
epidermis

sweat glands
sweat glands

vitamin D
vitamin D

Which factor correlated with human populations losing skin pigmentation?(1 point)
Responses

moving away from the poles
moving away from the poles

moving away from the equator
moving away from the equator

moving away from mountainous environments
moving away from mountainous environments

moving away from shaded environments

Which factors were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection?(1 point)
Responses

the impact of UV radiation on folate and Vitamin D levels in human populations
the impact of UV radiation on folate and Vitamin D levels in human populations

the clothing worn by humans in the early 8th century
the clothing worn by humans in the early 8th century

the interaction of human populations with predators in colder climates
the interaction of human populations with predators in colder climates

a change in the diet of human populations as they settled in colder climates

Question
Which situation demonstrates causation?(1 point)
Responses

Two variables decrease at the same time.
Two variables decrease at the same time.

A change in one variable produces a change in the other.
A change in one variable produces a change in the other.

Two variables increase at the same time.
Two variables increase at the same time.

One variable increases while the other decreases.

Which factor could have allowed the population of black peppered moths to increase in the late 1800s?(1 point)
Responses

less food
less food

less predation
less predation

less rain
less rain

less vegetation

Answer 1

1. Which component of skin protects against UV light?

   • Response: melanin

2. Which factor correlated with human populations losing skin pigmentation?

   • Response: moving away from the equator

3. Which factors were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection?

   • Response: the impact of UV radiation on folate and Vitamin D levels in human populations

4. Which situation demonstrates causation?

   • Response: A change in one variable produces a change in the other.

5. Which factor could have allowed the population of black peppered moths to increase in the late 1800s?

   • Response: less predation