Examine the figure above, which shows indices of aquatic and terrestrial primary productivity. Based on concentrations of chlorophyll, primary productivity in the ocean
A. is uniform, since the ocean is a single continuous body of water.
B. tends to increase with increase temperatures, from the poles to the equator.
C. is greatest in the open ocean, due to less air pollution and cloud cover.
D. is usually high in warm, tropical seas.
E. tends to be high near polar regions, due to seasonal mixing that redistributes nutrients.
E. tends to be high near polar regions, due to seasonal mixing that redistributes nutrients.
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In which of the following is the presence of different mating types critical to sexual reproduction?
A. Homothallic species B. Heterothallic species C. Arthrospore-producigin species D. Sporangiospore-producing species
The contribution an individual makes to the gene pool of the next generation relative to the
contributions of other individuals is called
a. competition. b. genetic drift. c. relative fitness. d. gene flow. e. mutation.
The term metastasis refers to the fact that cancer cells tend to ________.
Fill in the blank(s) with the appropriate word(s).
In blastulas, if cells from an area that would normally become skin are transplanted into an area that would become the nervous system, the transplanted cells will form structures of the nervous system
Indicate whether the statement is true or false