Why is the Hardy-Weinberg principle useful to biologists?
a. It describes most populations.
b. It proves that Mendel was correct for populations.
c. It explains the existence of variation in populations.
d. It explains the existence of a large number of species.
e. It identifies those factors that can change allele or genotype frequencies
e
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T cells and B cells are produced in the
A. bone marrow. B. thymus. C. Peyer's patches. D. nervous tissue.
Which organelles produce ATP by aerobic respiration?
a. Golgi bodies b. ribosomes c. mitochondria d. lysosomes e. endoplasmic reticula
Select the correct sequence of events of the human menstrual phase, beginning and ending with the menstrual cycle.
A. menstrual phase ? proliferative phase ? ovulation ? secretory phase ? menstrual phase B. menstrual phase ? ovulation ? secretory phase ? proliferative phase ? menstrual phase C. menstrual phase ? secretory phase ? proliferative phase ? ovulation ? menstrual phase D. menstrual phase ? proliferative phase ? secretory phase ? ovulation ? menstrual phase
The process represented at step A of the accompanying figure is referred to as:
a. filtration. b. secretion. c. excretion. d. deamination. e. elimination