An example of a single-gene trait that distinguishes humans from other primates is
A) the presence of two sides to the brain.
B) the abundance of fetal hemoglobin in humans.
C) the lack of adult hemoglobin in marmosets and lemurs.
D) our non-opposable thumbs.
B) the abundance of fetal hemoglobin in humans.
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In an experiment, the diencephalon was prevented from developing in a rat. Predict the most likely
consequences of this procedure.
a. The rat was not able to make noises. b. The rat was unable to move. c. The rat was unable to detect touch. d. The rat moved in a circular fashion. e. The rat could not right itself.
Many times species are composed of networks of distinct populations called metapopulations. When do metapopulations occur?
A. When a population is large and uniformly distributed. B. When a population in poor habitat continually sends out dispersers to bolster populations in better habitats. C. When a population in a better habitat does not send out colonizers into less suitable habitats. D. When suitable habitat is patchily distributed and separated by areas of unsuitable habitat.
Chlorosis, stunted growth with yellowing and
death of young leaves, is caused by a deficiency of a. nitrogen. b. zinc. c. magnesium. d. iron. e. any of these.
Food in a pressure cooker is cooked faster because of the
What will be an ideal response?