How a plant cell responds to a hormone depends on the
A) concentration of the hormone.
B) "shelf life" of the hormone.
C) presence of other plant cells nearby.
D) cell that secretes the hormone.
E) amount of available sunlight.
A
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Which of the following is NOT an effect observed in the guard cells of stomata?
A) Guard cell shrinkage B) K+ exits guard cells C) Changes in membrane potential D) cell expansion driven by proton ATPases E) water exits guard cells
Brown algae lack true roots but have similar structures called ____ that anchor them to their substrate
a. stipes b. blades c. holdfasts d. thalli e. rhizoids
The genetic preservation of the features that increase the likelihood of survival and reproduction of some individuals within a population is called the process of
A. creation of new species. B. natural selection. C. outcrossing. D. genetic drift. E. increasing evolutionary resistance.
Blood is surveyed for foreign material in the spleen.
Answer the following statement true (T) or false (F)