Chromosomes are duplicated during __________ of the cell cycle
a. G1 phase
b. G2 phase
c. S phase
d. metaphase
e. prophase
C
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Nocardia spp. cause which of the following types of infections in individuals who are immuno-compromised?
a. Mycetoma b. Lymphocutaneous infections c. Skin abscesses or cellulites d. Invasive pulmonary infections
Aerobic respiration became established as a result of
the evolution of a. the first proto-cells. b. the first true cells. c. metabolism. d. the cyclic pathway of photosynthesis. e. the noncyclic pathway of photosynthesis.
What causes the reproductive isolation that can lead to speciation?
A) Members of one group don't want to mate with other groups. B) Members of one group are unable to make fertile offspring with other groups. C) A group is extinct. D) Some members of a group are sterile.
Two species mate but their offspring die before reaching adulthood. A more efficient way to prevent interbreeding would be to have incompatible genitals.
a. true b. false