Allopatric speciation is not likely to occur when
A) there is no disruption in gene flow between two populations.
B) a geographic barrier forms between two populations.
C) several populations become isolated from one another as drying conditions cause a large body of water to become separate, smaller bodies of water.
D) separated populations adapt to different environmental conditions.
Answer: A
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Fill in the blank(s) with the appropriate word(s).
Which of the following receptors does not trigger depolarization of a sensory neuron?
A. mechanoreceptors B. G-protein receptors C. chemoreceptors D. photoreceptors E. exteroceptors and interoceptors
Once it is inside a human cell, the HIV enzyme, ________, manufactures a DNA copy from the viral RNA.
A. reverse transcriptase B. DNA polymerase C. forward transcriptase D. helicase
Nucleotide or nucleoside (acids/analogs/antisense) are antimicrobial agents that mimic the chemical structure of DNA building blocks.
Fill in the blank(s) with the appropriate word(s).