In the Grand Canyon, in the southwestern United States, there are many species of squirrels, including the Albert squirrel and a "subspecies," the Kaibab squirrel (isolation is not complete, according to the biological species definition by Ernst Mayr). The two populations of squirrels can interbreed to produce fertile offspring, but the populations exist on different portions of the rim of the Grand Canyon, separated by the canyon and the Colorado River. This is an example of speciation.
A. parapatric
B. allopatric
C. sympatric
D. postzygotic
E. prezygotic
B. allopatric
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Toxic dinoflagellates can directly harm other organisms during bloom periods by secreting their toxins in the water or by being consumed and concentrated in the tissues of filter-feeding organisms. Can you think of ways in which blooms of non-toxic dinoflagellates may harm other organisms in the water?
What will be an ideal response?
Genetics is the study of heredity and variation
Indicate whether the statement is true or false
A gene that produces multiple effects is called
a. a multiple allele. b. an autosome. c. an epistatic gene. d. a pleiotropic gene. e. an incompletely dominant gene.
Proteins that facilitate the folding of other proteins are called
a. foldases. b. binding proteins. c. chaperones. d. escorts.