Viruses:a
are very tiny cells on the order of 500 nm.
b. contain both RNA and DNA.
c. cannot independently perform metabolic activities.
d. have a standard morphology that includes a capsid, tail, and tail fibers.
e. have nuclei.
C
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Bryophytes are small and simple. Some produce a flattened photosynthetic structure called a:
A. phallus. B. thallus. C. prometheus. D. sporangium. E. primordia.
Centriole replication occurs during ____
a. G1 b. S c. G2 d. prophase e. telophase
A pet store puts both Norway rats (Rattus norvegicus) and black rats (Rattus rattus) in the same cage. If mating occurs, the pregnancy will not succeed because the embryos fail to develop properly. This is an example of
A) temporal isolation. B) hybrid inviability. C) hybrid infertility. D) hybrid vigor. E) gametic incompatibility.
A human female could ovulate about ____ times in her lifetime
a. 40 b. 400 c. 4,000 d. 40,000 e. 400,000