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vietquocnguyen vietquocnguyen
wrote...
Posts: 498
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6 years ago
Wavelike movements that propel food through the digestive system are called:
 
  a. peristalsis
  b. contractions
  c. muscle propulsion
  d. cilia beating
  e. microvilli and villi motion

Question 2

The vertebrate jaw first appeared in which organism?
 
  a. fishes
  b. amphibians
  c. reptiles
  d. birds
  e. mammals
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Replies
wrote...
6 years ago
Answer to q. 1

a

Answer to q. 2

a
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