The responses observed in type IV hypersensitivities result from the action of
A) IgE antibodies and mast cells.
B) T cells and phagocytes.
C) IgG and complement.
D) autoantibodies.
E) inflammatory chemicals.
B
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Which of the following statements is correct regarding C4 plants as compared with CAM plants?
A. In C4 plants, CO2 capture and the Calvin cycle happen in different places, whereas in CAM plants CO2 capture and the Calvin cycle happen at different times. B. In C4 plants, CO2 capture and the Calvin cycle happen at different times, whereas in CAM plants CO2 capture and the Calvin cycle happen in different places. C. C4 plants produce a 4-carbon organic acid as a storage form, whereas CAM plants produce a 4-carbon inorganic acid as a storage form. D. C4 plants do not require additional ATP, whereas CAM plants do require additional ATP. E. C4 plants are found in hot sunny environments, whereas CAM plants are found in moist cool environments.
The steps of the scientific method, in the correct order, are:
A) design experiments, draw conclusions, collect data, interpret results, make observations, and test the hypothesis. B) make observations, formulate the hypothesis, design experiments, collect data, interpret results, and draw conclusions. C) collect data, interpret results, test the hypothesis, design experiments, make observations, and draw conclusions. D) collect data, interpret results, test the hypothesis, make observations, and design experiments. E) none of the above
If while investigating spontaneous generation, Pasteur had his laboratory located in a stable
A. the results would, most likely, have supported the idea of spontaneous generation. B. the results would, most likely, have not supported the idea of spontaneous generation. C. this would have had no effect on his results. D. this would have shown his love of horses.
Any agent that can potentially cause cognitive, behavioral or physical harm to the developing embryo or fetus is a(n) ______.
a. psychoactive drug b. disease c. teratogen d. trophoblast