When solutions of host cells and infectious virions are mixed and spread on an agar plate, ________ form where viruses lyse the host cells
A) insertion sequences
B) plaques
C) prophages
D) colonies
Answer: B
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If a bacterial cell encounters unfavorable environmental conditions, then its metabolism will begin to slow until it eventually transforms into an inactive, dormant state. This survival me-chanism is known as:
a. polymerization. b. oxidation. c. respiration. d. sporulation.
To compensate for the barriers to implementing DNA profiling in mass disasters, Sir Alec Jeffreys advises assessing ________ STRs.
A) 15 to 20 B) 20 to 35 C) 25 to 30 D) 40 to 50
In many eudicots, the primary root that enlarges and persists throughout the life of the plant is a
A. stolon. B. rhizome. C. taproot. D. companion root. E. fibrous root.
Once a scientific theory becomes a law, it
A) cannot be changed. B) cannot be challenged. C) becomes static. D) is subject to modification. E) is irrefutable.