Four of the five answers below are correct statements about exoskeletons. Select the exception. ...

Four of the five answers below are correct statements about exoskeletons. Select the exception.
 
  a. an exoskeleton consists of noncellular secreted material.
  b. repeatedly producing new exoskeleton uses resources that the animal could put towards growth and reproduction.
  c. the exoskeleton is made of bone and cartilage.
  d. the exoskeleton protects the soft body tissues inside it.
  e. exoskeletons exist in some invertebrates.

Question 2

Agar and carrageenan are extracted from ____ for use as thickeners or stabilizers in foods, cosmetics, and personal care products.
 
  a. brown algae
  b. red algae
  c. green algae
  d. brown algae and green algae
  e. red algae and green algae