Abscission affects
a. leaves.
b. fruits.
c. flowers.
d. all of these.
e. none of these.
Answer: d
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Quorum sensing
A. is used by bacteria to sense the density of cells. B. involves the production and monitoring of the amount of homoserine lactone present. C. is used by bacteria to limit the density of bacteria. D. is used by eukaryotes to sense the presence of bacteria. E. is used by bacteria to sense the density of cells AND involves the production and monitoring of the amount of homoserine lactone present.
What adaptation is found in the evergreen trees of boreal forests?
A) a thick waxy coat on leaves B) lower levels of chlorophyll in leaves C) the ability to shed leaves when water availability is low in winter D) flower production in early spring
Kinase enzymes
A) add phosphate groups. B) always inhibit target molecule activity. C) bind tightly by wrapping around a target molecule to regulate its activity. D) remove phosphate groups. E) metabolize glucose.
________ can be thought of as not responding to a stimulus.
Fill in the blank(s) with the appropriate word(s).