When geographic isolation occurs, under what conditions might you expect the most rapid speciation?
A) when there is similarity in the food supply in both locations
B) when the climate is very different in the two locations
C) when the species has a long generation time
D) when one of the two groups becomes extinct
B
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To increase the rate of a reaction you could:
A. Add more products. B. Decrease the temperature. C. Add more reactants. D.
DDT is a(n)
a. blight that affects American chestnut trees. b. endangered plant species. c. pesticide. d. wildlife refuge area in Yellowstone National Park.
The chromosome theory of inheritance states that
A) genes are located on chromosomes. B) chromosomes replicate before cell division. C) alleles of a gene segregate during cell division. D) chromosomes consist of DNA. E) different chromosomes assort independently of one another.
Which of these is a function of the plasma membrane?
Maintains structural integrity of the cell Is selectively permeable to regulate movement of substances into and out of the cell Contains glycoproteins to provide recognition between cells All of these are functions