Which of the following types of mutation may play an important role in driving evolution because they are often nonlethal and, therefore, remain in the gene pool?
A. Missense
B. Frameshift
C. Nonsense
D. Deletion
Answer: A
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In the context of vision, what does accommodation mean?
a. Accommodation is the lack of receptor response to continuous light signals. b. Accommodation refers to changing the shape of the lens. c. Accommodation is the movement of the lens closer to or further away from the retina in order to focus the d. Accommodation keeps the lens under tension to allow for image focusing. e. Accommodation prevents light from scattering upon entry to the eye.
Choose any and all of the following that would describe a gamete that is missing one chromosome
a. The chromosome number would be expressed as 2n ? 1. b. One chromosome would occur without its homologue. c. The condition would be called monosomy. d. The chromosome number would be expressed as 2n ? 1 and the condition would be called monosomy. e. The chromosome number would be expressed as 2n ? 1, the condition would be called monosomy, and one chromosome would occur without its homologue
In the accompanying figure, the function of the structure labeled C, particularly in small children, is to:
a. produce blood cells. b. act as a growth center. c. provide mechanical strength. d. serve as an attachment site for tendons. e. nourish the bone tissue
Taxis is
a. another term for bacterial tumbling. b. caused by the undulating motion of a bacterium. c. another word for stimulus. d. movement towards or away from a stimulus.