All of the following are correct about allergic reactions to drugs except
A. hives may be the result after the drug is taken.
B. allergic reactions generally will occur the first time a person takes the drug.
C. the drug acts as an antigen.
D. anaphylaxis can occur.
E. the greatest number of antimicrobic allergies are to the penicillins.
Answer: B
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When one plant is shaded by another, why is the ratio of far-red to red light increased compared to an unshaded plant?
A. Phytochrome in the taller plant absorbs most of the red light. B. Auxin absorbs mostly far-red light. C. As light passes through the leaves of the taller plant, most of the red light is absorbed by chlorophyll. D. Far-red light mostly reflects off the surface of the soil while red light is mostly absorbed. E. Shade is enriched in far-red wavelengths of light.
Thomas Malthus proposed that ____
a. the food supply increases faster than the population b. the population increases faster than the food supply c. the food supply and population increase at the same rate d. artificial selection is the key to evolution e. natural selection is the key to evolution
When examining the effects of forward and reverse mutation rates, what equation is used to calculate the change in the frequency of A2, or ?q?
What will be an ideal response?