Arthropod exoskeletons and mollusk shells both _____
A) completely replace the hydrostatic skeleton
B) are secreted by the mantle
C) help retain moisture in terrestrial habitats
D) are comprised of the polysaccharide chitin
C
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Which of the following is the most abundant immunological class produced?
A. IgA B. IgD C. IgG D. IgE
Hydrophobic molecules are ____ water
a. attracted by b. absorbed by c. repelled by d. mixed with e. polarized by
Which of the following does NOT apply to
parasitoids? a. insects b. kill animals on which they feed c. host usually survives d. larvae develop in host body e. can beeffective biocontrol agents
Mutations that convert proto-oncogenes to oncogenes are mutations that cause
A. the gene to produce an altered gene product. B. underproduction of a normal gene product. C. overproduction of a normal gene product. D. an increase in the number of copies of the normal gene. E. all of these.