One of the disadvantages of exoskeletons in arthropods is that:A
they severely limit locomotion.
B. they interfere with ingestion.
C. they must be shed when the animal grows.
D. they do not provide adequate protection from predators.
E. they do not prevent desiccation
C
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What molecule indirectly provides the energy for translation?
A. ADP B. ATP C. GMP D. GDP E. GTP
Structures that are no longer needed but remain within the body are called
a. vestigial structures. b. nonuseful structures. c. ancient structures. d. defunct structures. e. retrostructures.
An animal cell lacking oligosaccharides on the external surface of its plasma membrane would likely be impaired in which function?
A) transporting ions against an electrochemical gradient B) cell-cell recognition C) attaching the plasma membrane to the cytoskeleton D) establishing a diffusion barrier to charged molecules
What is the purpose of the waxy cuticle in plants?
a. It prevents desiccation. b. It prevents transpiration. c. It prevents diffusion of gases. d. It prevents the transport of nutrients. e. It prevents the internal transport of water.