Of the following organisms, which has a unique developmental life cycle including a replicative form, the reticulate body (RB), and an extracellular, metabolically inert, infective form, the ele-mentary body (EB)?
a. Rickettsia
b. Chlamydia
c. Ehrlichia
d. Coxiella
B
The chlamydial organisms have a unique developmental life cycle, with an intracellular growth, or replicative form, the RB, and an extracellular, metabolically inert, infective form, the EB. Structurally, the chlamydial EB closely resembles a gram-negative bacillus; however, its cell wall lacks a peptidoglycan layer.
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The term "phage" is generally reserved for the viruses that infect
A) animals. B) plants. C) bacteria. D) multiple species.
A parent with a genotype of AA will produce gametes ____
a. with A b. with Aa c. with A or a d. that are heterozygous e. that are homozygous dominant
Discuss the main differences between plant and animal growth. What will be an ideal response?
neutralizes acid
What will be an ideal response?