True or false: Bushmen hunters avoid the effects of physiological stress during prolonged hunts by increasing their carbohydrate intake as much as possible before the hunt
A. true
B. false
B
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Courtship displays, aggressive displays, and distraction displays are all examples of which of the following?
a. pheromones b. language c. signals d. vocalizations
We recognize three levels of biodiversity: genetic
diversity, species diversity, and __________diversity. Fill in the blank(s) with the appropriate word(s).
Caspases are produced as inactive precursors known as ________
Fill in the blank with correct word.
Edward Jenner noticed that the milkmaids who milked cows by hand often were infected with cowpox and that their infections were mild. He also noticed that these same milkmaids did not contract smallpox, which was a much more serious disease. He presumed that the cowpox infections prevented the milkmaids from contracting the much more serious disease of smallpox. Subsequently he began vaccinating people with the pus-like material from cowpox lesions to determine if his thinking was correct. In the story above, the underlined portion is a(n)
A. hypothesis. B. observation. C. theory. D. experiment.