CAM photosynthesis improves the CO2/H2O exchange ratio because ________
A. the Calvin cycle is active during the day
B. organic acids are decarboxylated at night
C. organic acids are decarboxylated in
daylight
D. CO2 capture occurs at night
E. CO2 capture and fixation occur in different
cells
D
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The activation of proteinase inhibitor genes occurs
A. in the cytoplasm of the affected cells. B. on the plasma membrane of the affected cells. C. in the nucleus of the affected cells. D. before the systemin moves through the phloem of the plant. E. in anticipation of a physical wound to the plant.
A reflex ____
a. only involves the use of sensory neurons b. is an automatic response to a stimulus that requires considerable thought c. is an automatic response to a stimulus that doesn't require thought d. is an involuntary response that requires only one neuron e. does not require the brain
Oxygen is necessary for cellular respiration because oxygen
A) combines with carbon to form carbon dioxide. B) reduces glucose to form carbon dioxide and water. C) combines with electrons to form CO2. D) combines with electrons and hydrogen ions to form water. E) combines with carbon dioxide and water to form glucose.
Select the best choice for the following statements using the five groups listed below.
A. All members of this group are parasitic alveolates. B. These move by means of pseudopods. C. These possess an eyespot for detecting light needed for photosynthesis. D. These are a common source of bioluminescence in tropical seas. E. Chagas disease and African sleeping sickness are caused by members of this group.