[Campbell Biology P.756] The arthropod exoskeleton is a defining feature. Which of the follo... | Practice Question

The arthropod exoskeleton is a defining feature. Which of the following statements about the arthropod exoskeleton is FALSE?

  • A: It is composed of protein and the polysaccharide chitin.
  • B: It provides rigid protection and points of attachment for muscles.
  • C: Its relative impermeability to water was crucial for arthropods colonizing land.
  • D: It allows for continuous growth, eliminating the need for molting.

Explanation

The text states that the exoskeleton "prevents the arthropod from growing, unless it occasionally sheds its exoskeleton and produces a larger one. This molting process is energetically expensive..." Therefore, it does not allow for continuous growth and requires molting.