Calcium must activate prothrombin to its enzyme form before it can participate in the clotting mechanism
Indicate whether the statement is true or false
TRUE
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You observe that chimps use sticks to collect termites for food. Which of the following would indicate this the use of the stick is a learned behavior?
A. The chimp is the only member of his or her population that exhibits this behavior. B. The chimp prefers eating termites to other types of insects. C. Food is abundant in the chimp's environment. D. Chimpanzees raised in isolation do not use sticks.
Four of the five statements below are true of cDNA
Select the exception. a. produced from mature mRNA b. produced by reverse transcriptase c. involves a cDNA–mRNA hybrid d. involves DNA polymerase e. is manufactured in bacteria cells
Enzymes work by lowering the ________ energy of a reaction.
a) kinetic b) potential c) released d) activation
Tundra is divided into alpine tundra at the top of mountains and arctic tundra found close to the North Pole. These two biomes have similar plants and animals even though they can be located in vastly different regions of the world. What causes these two biomes to be similar?
Select one: a. Both are found close to coniferous forests. b. One is cold and dry because it is at a high latitude and the other is cold and dry because it is at a high altitude. c. Both are located in areas of intense sunshine. d. One grows mostly grasses because the soil is poor and the other grows mostly grasses because the soil is frozen. e. Both have large grazing herds that keep the grasses clipped short.