A typical human body cell contains how many sex chromosomes?
A) 2 B) 46 C) 1 D) 23
A
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What will be an ideal response?
A protein on the surface of cytotoxic lymphocytes can elicit self-destruct mechanisms in target cells by interacting with
A) TGF? receptors. B) Death receptors. C) EGF receptors. D) Bcl-2. E) procaspase 3.
The introduction of a new species into an area that has several different habitats and very rich resources, but no predators will likely lead to
A) mechanical incompatibility. B) adaptive radiation. C) temporal isolation. D) extinctions. E) limited speciation.
A genomic region can rapidly become very common in a population due to
A) positive selection. B) negative selection. C) specific selection. D) linkage equilibrium. E) homologous recombination.