Salmon are able to live in both fresh water and salt water. Salmon are therefore:
A. conformers.
B. effectors.
C. regulators.
D. conditioned.
Answer: C
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Connective tissue is indicated by
a. A. b. B. c. C. d. D. e. E.
The burning of fossil fuels by cars and factories has most affected the ______________ cycle.
Fill in the blank(s) with the appropriate word(s).
Damage to its flagellum would prevent a choanocyte from
A. secreting spongin to form the sponge body. B. circulating water through the sponge. C. producing the supportive spicules. D. stinging and capturing prey.
Which of the following changes in life history of the North Atlantic cod could have alerted scientists to the impending population crash?
A. A type I growth curve B. A shift to K-selection characterized by larger fish C. A shift to r-selection characterized by smaller fish D. Type I growth curve the first year and type II in years two and three E. Type I the first year, type II the second year, and type III the third year