All of the following are characteristics of viruses except
A. they can cause mild diseases.
B. they can cause fatal diseases.
C. they can be crystallized.
D. they often have a geometric capsid.
E. they have a viscous fluid inside their capsids.
Answer: E
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In a fetal pig, dorsal and ventral refer respectively to
(a) the head and tail regions of the body. (b) the tail and the head regions of the body. (c) the upper (back) portion and the lower (underside) portion of the body. (d) the lower (underside) portion and the upper (back) portion of the body.
The property of water whereby molecules tend to stick to objects is called:
a. cohesion. b. surface tension. c. dissolving ability. d. adhesion. e. viscosity.
Select the functions of the thyroid gland.
A gene pool is
A. all the genes in a population. B. the genes that are unique to a species. C. a group of species that look alike but are not located in the same area at the same time. D. all the similar genes in a gene family. E. a swimming hole for geneticists.