What biochemical test is used to distinguish between the Enterobacteriaceae and the Pasteurellaceae?
A. lactose fermentation
B. oxidase test
C. motility
D. pigment production
E. Gram stain
Answer: B
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A chromosomal inversion that does not include the centromere is
A) epicentric. B) paracentric. C) metacentric. D) isocentric.
Human spermatogonia
A. are diploid. B. are diploid cells that reside within the seminiferous tubules. C. are germ cells. D. are germ cells that reside within the seminiferous tubules. E. reside within the seminiferous tubules.
Which form of sea life is showing signs of decreasing numbers?
a. carp b. swordfish c. sharks d. blue fish e. eels
What results in populations that change due to genetic drift?
A) They haven't really undergone evolutionary change. B) They will then be subject to strong sexual selection. C) They have evolved. D) They will soon change back to the original form as a result of natural selection.