Lesson: Chapter 13 — The Living World

13.1. Vertebrates 6 of 8 Reset answers

Clear all your answers?

This erases every answer in this set and starts you again at question one. Your score will be gone.

Type these four numbers to confirm:

Those numbers don't match. Look at them again and type them.

Yes, clear Keep them

Question 6

Why do birds have a beak rather than teeth in the mouth?

A Because they do not eat B Because a beak looks better C Because teeth are heavy D Because teeth take time to grow

The right answer is the one marked above.

Because teeth are heavy. Like light bones and a streamlined shape, having no teeth is an adaptation that helps flight.

The beak is shaped to the pattern of feeding — so it does the work of teeth, without the weight.

Answer the question to continue.