If in male fruit flies, crossing-over does not occur during meiosis, while in females crossing-over does occur
A. there is less genetic variety among sperm than among eggs.
B. fewer sperm are produced than eggs.
C. males are not necessary for fertilization in fruit flies.
D. more female offspring will be produced than male offspring.
A. there is less genetic variety among sperm than among eggs.
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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.
The site of gravity perception in roots is the root apical meristem. Indicate whether the statement is true or false
The time from when pathogen first enters the body and begins to multiply, until symptoms first appear is the
A. incubation period. B. convalescent stage. C. prodromal stage. D. period of invasion. E. All of these choices are correct.
Reactions that are both catabolic and anabolic are amphibolic.
Answer the following statement true (T) or false (F)