Which of the following is a domain of life?
a. eukaryotes
b. plants
c. animals
d. protists
e. fungi
ANSWER: a
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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.
Describe the observational differences between long-period and short-period comets
What will be an ideal response?
Polyploidy is an important mechanism of speciation in plants
Indicate whether the statement is true or false
Growth factors stimulate
A) the cell to skip the S and G1 phases of interphase and undergo mitosis directly. B) cells to divide. C) the cell to ignore the checkpoints of the cell cycle. D) Cdks to synthesize enzymes that digest cyclins.