Sulfate reduction in MOST anoxic environments is limited by
a. oxygen concentrations.
b. sulfate availability.
c. hydrogen concentrations.
d. light availability.
Answer: B
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Genes are precisely copied during the process of DNA replication and never undergo any change
a. True b. False Indicate whether the statement is true or false
In food webs, chain lengths
A. are long and complex. B. have at least five links. C. tend to be short. D. range between five and ten links. E. are usually two links.
A recovering stroke patient complained about strange smells in his room, but no cause could be found. The doctor diagnosed this as phantosmia, or olfactory hallucination, and said it was likely due to stroke-related damage to which tissue?
A. Peripheral nervous system B. Olfactory receptors C. Nodes of Ranvier D. Central nervous system
Spherical-shaped bacteria that divide and remain attached in a chain-like pattern are called:
A. Staphylococci B. Streptococci C. Streptobacilli D. Staphylobacilli