Growth factors such as platelet-derived growth factor function in:
A. autocrine signaling.
B. paracrine signaling.
C. endocrine signaling.
D. juxtacrine signaling.
B
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If you tracked an individual X chromosome from a male to his first generation offspring, then to his second generation offspring, what pattern would you see?
A. His X chromosome would be found only in his daughters and granddaughters. B. His X chromosome would be found only in his sons and grandsons. C. His X chromosome would be found only in his daughters and grandsons. D. His X chromosome would be found only in his daughters, then in both his granddaughters and grandsons. E. His X chromosome would be found only in his sons, then in both his granddaughters and grandsons.
Which viral life cycle would result in a quicker death for an infected cell?
A. The prophage cycle B. The retroviral cycle C. The lysogenic cycle D. The lytic cycle
________ arise out of deep water and have a lagoon in the center of it
a. Barrier reefs b. Atolls c. Patch reefs d. Fringing reefs
Equilibrium theories of species diversity have been applied to islands and to larger, continental regions. Which of the following processes is likely to play a greater role in the determination of equilibrium diversity in a continental region?
A) extinction of species B) immigration of species from elsewhere C) formation of new species