Natural Selection and Human Evolution Quiz

What is melanin?

• A special colour (pigment) in your skin, hair, and eyes.

• A type of vitamin.

• A kind of UV radiation.

• A type of food.

What is UV radiation?

• Energy from the sun that is visible.

• Energy from the sun that is invisible and can cause changes to our skin.

• A type of vitamin.

• A pigment in the skin.

Why is it important for us to go into the sunlight?

• Sunlight helps your body make vitamin D.

• Sunlight gives you a tan.

• Sunlight makes you feel warm.

• Sunlight helps you see better.

What role did natural selection play in the evolution of human skin color?

• It selected the skin color that was best for survival in different environments.

• It made all humans have the same skin color.

• It had no effect on skin color.

• It made skin color lighter everywhere.

How does vitamin D benefit our health?

• It strengthens bones and supports the immune system.

• It helps in digestion.

• It increases hair growth.

• It improves eyesight.

How does melanin protect the skin from UV radiation?

• By cooling the skin surface.

• By making the skin thicker.

• By reflecting UV rays away from the skin.

• By absorbing and dissipating UV rays.

What factors influence the amount of melanin in a person's skin?

• Genetics and exposure to sunlight.

• Diet and exercise.

• Age and gender.

• Height and weight.