Each arm of the starfish differs internally, one being specialized for reproduction, another for respiration, a third for digestion, a fourth for the water vascular system, and the fifth for the nervous and circulatory systems.
Answer the following statement true (T) or false (F)
False
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In the 1960s, evolutionary biologists identified protein polymorphisms using ____, which allowed them to infer how
much genetic variation exists within populations.
a. genome sequencing b. gel electrophoresis c. artificial selection d. polymerase chain reactions e. DNA microarrays
Sympatric speciation that occurs via autopolyploidy is most often seen in what kind of organisms?
a. bacteria b. fish c. birds d. plants
In the Sierra Nevada Mountains of California there are many populations of the checkerspot butterfly Euphydryas editha. You notice that females of one population lay their eggs near the tip of a plant's stem (population A)
Females of another population in the same area lay their eggs at the base of the stem on a different type of plant (population B). The young hatch out as caterpillars; they live on the host plant and eat its leaves. Is the information above a complete description of the butterflies' niche? A. Yes, because I know the butterflies live in the Sierra Nevada. B. Yes, because both eggs and adults are described above. C. Yes, because eggs, young, and adults are described above. D. No, because I also need to know what the adults eat. E. No, because a complete niche includes physical and biological factors.
The number of individuals that make up a
population gene pool is the
a. population distribution. b. population growth. c. population birth rate. d. population size. e. carrying capacity