Most phyla of aquatic invertebrates have improved the rate of gas exchange by creating a water current over their respiratory surfaces, thereby _____.
A. changing the diffusion constant
B. increasing the surface area for diffusion
C. decreasing the distance for diffusion
D. increasing the concentration difference
D. increasing the concentration difference
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The Arctic tern makes an annual migration of up to ____
a. 700,000 km b. 70,000 km c. 7,000 km d. 700 km e. 70 km
All heterotrophs to some degree function as decomposers
Indicate whether the statement is true or false
Excess transpiration:a
may be harmful to a plant. b. causes an increase in turgor pressure. c. is a synonym for precipitation. d. occurs mainly in the winter. e. is automatically counteracted by absorbing water from the soil.
If a mutation were to occur in lambda phage that made it unable to express integrase, what would happen?
a. It would be stuck in the lysogenic cycle. b. It would be unable to form circular DNA once it entered the host. c. It would be unable to inject its DNA into the host. d. It would be unable to recombine with the bacterial chromosome.