Welcome to your B7 Practice Questions 10.10 – Birds, mammals & the evolution of horses

1. 
Which feature do only birds have?

2. 

Birds evolved from .

3. 
All birds can fly.

4. 

Birds lay eggs with shells.

5. 
What is the pinna?

6. 

Mammary glands produce to feed the young.

7. 
Only mammals have a uterus and a placenta.

8. 

The is a muscle that separates the chest cavity from the abdominal cavity.

9. 
When did the evolution of horses begin?

10. 

The early horse Hyracotherium was only about as big as a .

11. 
Hyracotherium had a straight back and lived in the steppe.

12. 

Mesohippus had only toes on each foot.

13. 
Mesohippus had broad teeth with enamel folds. What were they good for?

14. 

Today's horses, zebras and donkeys belong to the genus .

15. 
About 2 million years ago, Equus species migrated from North America to Asia over a land bridge.

16. 

One of the last wild horse species lives probably only in zoos today: the horse.