How is mechanical stress, or workload, detectable in the human skeleton?
a. Through signs of osteoarthiritis in which the cartilage between joints wears away, often because of overuse of the joint.
b. Through growth arrest features, such as Harris lines and enamel hypoplasias.
c. Through mortality profiles that depict the various ages at death of a burial population.
d. Through blood work to determine red blood counts.
e. It is not detectable in the human skeleton.
a
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At least ________ of the vervet monkey's alarm calls are considered symbolic
a. 3 b. 2 c. 5 d. 6
People can communicate using nonlinguistic sym¬bols
Indicate whether the statement is true or false.
Which of the following is an example of a behavioral adjustment?
A. increased lung capacity B. vasoconstriction C. construction of an igloo D. increased breathing rate
Herders are able to live in very difficult terrain because
a. they have developed more sophisticated cultivation practices than horticulturalists. b. their herds can eat vegetation that humans cannot digest and turn it into milk and meat. c. they are extremely isolationist and prefer living in areas with very small populations. d. they evolved genetic adaptations that make them better able to withstand the cold.