Delayed type hypersensitivity primarily involves
A. erythrocytes.
B. B cells.
C. T cells.
D. mast cells.
C
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A taxis is distinguished from a kinesis because a taxis is ____ movement while a kinesis is ____
movement.
a. ordered; a change in the rate of b. a migratory; a local c. random; directional d. a group; an individual e. slow; fast
Which of the following can be changed based on
new evidence? a. hypothesis b. theory c. prediction d. experiment e. all of these
All of the following can contribute to desertification
EXCEPT a. drought. b. overplowing. c. overgrazing. d. farming in areas with high winds. e. all of these.
The release of DDT into the environment to control some insect pests will result in the highest
detectable concentrations a. at the bottom of the food chain. b. in the targeted insect pest. c. in the middle of the food chain. d. at the end of the food chain. e. nowhere, because DDT is degraded rapidly.