The potential capacity to produce offspring is called:a
life history traits.
b. fitness.
c. age structure.
d. density.
e. fecundity.
e
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The acetylcholine receptor is
A. a ligand-gated ion channel that produces depolarization by allowing Na+ ions to enter the muscle fiber. B. a ligand-gated ion channel that produces hyperpolarization by allowing Na+ ions to enter the muscle fiber. C. a ligand-gated ion channel that produces depolarization by allowing Cl- ions to enter the muscle fiber. D. a ligand-gated ion channel that produces depolarization by allowing K+ ions to leave the muscle fiber. E. a metabotropic receptor that stimulates muscle activity by activating second messenger systems within the muscle fiber.
What is the difference between a genetic disorder and a genetic abnormality?
a. There is no difference between a disorder and an abnormality b. The abnormality is always caused by environmental stimuli. c. The disorder will kill the individual while the abnormality is not life threatening. d. The disorder is always caused by environmental stimuli. e. The abnormality will kill the individual while the disorder is not life threatening.
Plant tissue specialized for conducting fluids is
a. ground tissue. b. protoderm. c. vascular tissue. d. meristem. e. dermal tissue.
Anaphase of mitosis occurs when:
a) the chromatids begin to separate from the metaphase plate. b) the chromosomes line up on the 'equator'of the cell. c) the cell enters interphase. d) the chromatin coils into thicker, visible chromatids. e) the nuclear envelope first breaks down.