The photoreceptor that absorbs blue light and triggers a phototropic response is:
a. phototropin.
b. phytochrome.
c. jasmonate.
d. systemin.
e. zeatin.
A
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Different types of proteins are found on the surface or embedded in the plasma membrane of a
cell. Which of the following is a function of these proteins?
a. to transport substances b. to receive signals from the nervous system c. to allow for recognition among cells d. all of these
If a living plant cell is placed in a beaker with a solution that has a ? value lower than the ? value of
the plant cell, the plant cell will
a. take up water until it bursts. b. lose water until its ? = ? of the solution. c. take up water until within the cell ?P = ??S. d. take up water until its ? = ?S of the solution. e. lose water until its ?S = its ?P.
This arthropod has four pairs of walking legs,
no antennae, and is venomous. This arthropod is ___.
a. a scorpion b. a tick c. a barnacle d. a bee e. more than one of these
All of the following are true for soil with a low pH except:a
aluminum is more soluble. b. calcium phosphate becomes less soluble. c. acidic soil can be found in Pygmy forest in California. d. potassium is leached more readily from the soil. e. manganese may be available in toxic concentrations