The component of skin that protects against UV light is melanin.
Which component of skin protects against UV light?(1 point)
Responses
epidermis
epidermis
vitamin D
vitamin D
melanin
melanin
sweat glands
9 answers
Which factor correlated with human populations losing skin pigmentation?(1 point)
Responses
moving away from shaded environments
moving away from shaded environments
moving away from mountainous environments
moving away from mountainous environments
moving away from the poles
moving away from the poles
moving away from the equator
Responses
moving away from shaded environments
moving away from shaded environments
moving away from mountainous environments
moving away from mountainous environments
moving away from the poles
moving away from the poles
moving away from the equator
The factor correlated with human populations losing skin pigmentation is moving away from the equator.
Which factors were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection?(1 point)
Responses
a change in the diet of human populations as they settled in colder climates
a change in the diet of human populations as they settled in colder climates
the interaction of human populations with predators in colder climates
the interaction of human populations with predators in colder climates
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
Responses
a change in the diet of human populations as they settled in colder climates
a change in the diet of human populations as they settled in colder climates
the interaction of human populations with predators in colder climates
the interaction of human populations with predators in colder climates
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 factors that were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection is the impact of UV radiation on folate and Vitamin D levels in human populations.
Which situation demonstrates causation?(1 point)
Responses
A change in one variable produces a change in the other.
A change in one variable produces a change in the other.
Two variables decrease at the same time.
Two variables decrease at the same time.
One variable increases while the other decreases.
One variable increases while the other decreases.
Two variables increase at the same time.
Two variables increase at the same time.
Responses
A change in one variable produces a change in the other.
A change in one variable produces a change in the other.
Two variables decrease at the same time.
Two variables decrease at the same time.
One variable increases while the other decreases.
One variable increases while the other decreases.
Two variables increase at the same time.
Two variables increase at the same time.
The situation that demonstrates causation is A change in one variable produces a change in the other.
Which factor could have allowed the population of black peppered moths to increase in the late 1800s?(1 point)
Responses
less rain
less rain
less predation
less predation
less food
less food
less vegetation
less vegetation
Responses
less rain
less rain
less predation
less predation
less food
less food
less vegetation
less vegetation
The factor that could have allowed the population of black peppered moths to increase in the late 1800s is less predation. This increase was largely due to the Industrial Revolution, which caused changes in the environment that reduced predation pressure on the darker-colored moths.