What is the best definition of a population?
a. a group of individuals of two different species that interact with each other
b. a group of interbreeding individuals from different geographical regions
c. a group of potentially interbreeding individuals of the same species regardless of where they live
d. a collection of different species living in the same area at the same time
e. a group of interbreeding individuals of the same species in a given area
ANSWER: e
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Based on the tree shown above, the sister group to small tree finches would be:
A. the group consisting of large and medium tree finches. B. large tree finches. C. medium tree finches. D. woodpecker finches. E. the group consisting of woodpecker and mangrove finches.
Which enzyme is responsible for synthesizing an RNA strand from a DNA template strand?
a. RNA polymerase b. RNA ligase c. DNA ligase d. DNA polymerase
Human pathogens fall into the group called ________.
A. acidophiles B. mesophiles C. thermophiles D. psychrophiles E. halophiles
The plasma membranes of root hair cells contain a variety of protein transport channels through which specific ions are transported, even against large concentration gradients, by
A. carbohydrate pumps. B. water pumps. C. hydrogen ion pumps. D. root pumps. E. electron pumps.