What role do volatile secondary metabolites, released in response to herbivory, play in a plant?
a. They kill the insects that are feeding on the plant.
b. They trigger the production of a foul-tasting chemical that deters insects from feeding.
c. They attract wasps that parasitize insects that feed on the plant.
d. They produce a scent that deters insects from approaching the plant.
e. They cause cells in the infected region to commit suicide via a "hypersensitive" response.
c
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The genes a, b, and c are different genes that reside on the same chromosome. Genes a and b are 10 cM apart, b and c are 2 cM apart, and a and c are 8 cM apart. What is the order of these genes?
A: A: a, c, b B: The order cannot be determined from the information given. C: a, b, c D: b, a, c E: c, a, b
Which of the following do guard cells act to regulate?
A) stomata B) cuticle C) epidermis D) root hairs
Why are fossils from older species found deeper in the ground than those from more recent species?
Which of the following is a characteristic shared by DNA and RNA polymerases?
A) efficiency of proofreading B) type of nucleotides used C) direction of polymerization D) speed E) dependence on helicase