The number of DNA molecules in a duplicated
chromosome is
a. one.
b. undetermined.
c. half that of an unduplicated chromosome.
d. two.
e. four.
D
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Decomposers are commonly _____
a. fungi c. plants b. bacteria d. fungi and bacteria
Fick's law states that:a
the amount of gas diffusing across a membrane depends on differences in partial pressure. b. the total pressure of a mixture of gases is the sum of the pressures of the individual gases. c. the dissociation of oxygen from hemoglobin depends on the pH of the environment. d. as oxygen concentration increases, there is an increase in the amount of hemoglobin produced. e. the size of an animal varies inversely to the amount of diffusion across its respiratory membranes.
How are lipids different from other categories of biological molecules?
A. They are not organic. B. They will not combine with water. C. They do not have carbon. D. They are much more complex. E. They are not seen in all living things.
You have been studying the relationship between jackals and tigers in India. Until recently, the only relationship you have observed is that jackals will associate themselves with a particular tiger and follow it at a safe distance in order to feed on the big cat's kills. However, recently you observed a jackal alerting a tiger to a potential kill with a loud cry. If you continue to observe this alerting behavior, you might change the categorization of the jackal/tiger relationship from ________ to ________.
A. mutualism; parasitism B. competition; predation C. mutualism; commensalism D. parasitism; mutualism E. commensalism; mutualism