Net primary productivity represents:a
the rate at which energy is captured during photosynthesis.
b. the amount of biomass in excess of that needed to support plant cell respiration.
c. the amount of carbon dioxide produced by plants.
d. plant reproduction per unit area per unit time.
e. energy production in an area per unit time.
B
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Which of the following animals did Darwin
study that helped form his ideas on evolution?
a. dogs b. armadillos c. glyptodons d. finches e. all of these were animals Darwin studied
The sarcolemma of a muscle fiber is the
A. nucleus B. mitochondia C. plasma membrane D. connective tissue covering E. none of the above
The differential expression of genes depending on parental origin is called ____________________
Fill in the blank(s) with the appropriate word(s).
Why do bacterial cells require calcium?
A. It makes strong bones. B. It stabilizes the ribosomes. C. It stabilizes the cell wall. D. It maintains cellular pH. E. It stabilizes the nucleoid.