A common direct consumer of eelgrass (Zostera) is:
a. snails.
b. waterfowl.
c. sea cucumbers.
d. manatees.
e. sea stars.
B
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Species turnover on islands has been observed to be low. What does this suggest about succession on islands?
A. Facilitation is of minor importance on islands. B. The species that initially colonize islands are random. C. Succession on most islands proceeds in a relatively predictable manner. D. The dominant, more important species tend to go extinct during succession on islands.
Bacteriophages are viruses that ____
a. catalyze bacterial reproduction b. attach to bacterial cells and extract bacterial DNA c. interfere with DNA replication in the cytoplasm of cells d. produce histones e. infect and copy themselves inside bacterial cells
Which of the following is not a strategy of the body to defend against foreign organisms and cancer cells?
A) physical barrier B) adaptive immune response C) internal cellular defense D) antibiotic pills
Identify the articulation site that allows us to rotate our head, e.g. shaking the head "no".
What will be an ideal response?