Arthropods

Question 0

Bird have hollow bones to help then with?

Answer 0

To be light weight for flying.

Question 1

________
protect them from predators
Enable them to retain water and keep out excess water
Allow them to be lightweight for quick movement

Answer 1

Exoskeletons

Question 2

________ _______ that some bird has help them see better at night.

Answer 2

Enlarged eyes