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6 Cards in this Set

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  • Back

Why do birds need sharp eyes?

to spot their food

What is the purpose of an insect's simple eyes?

Simple eyes help insects to be aware of changes in light.

What is the purpose of an insect's compound eyes?

Compound eyes help them to see in many directions at the same time.

What do many animals have on the back of their eyeballs thelp them see at night?

a layer of cells called the tapetum

What causes an animal's eyes to look as if they glow in the dark?

The tapetum layer reflects light back to the light source.

Why do butterflies, bees, and birds need to distinguish color?

to help them find their food and mates