The agricultural research that resulted in the Green Revolution developed new crop varieties that have been called "high responders" because
A) they have responded well to the expectations of the researchers.
B) they respond by growing well under all conditions, even in bad years.
C) they respond by producing more with less water and fertilizer.
D) they respond with increased yields to optimum amounts of fertilizer and water.
E) none of the above.
D
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Ouranopithecus shares many features with the living African great apes
a. True b. False Indicate whether the statement is true or false
What do the terms "fission" and "fusion" refer to in hunting-and-gathering societies?
A. hazards of contacts with the industrialized world B. cyclical change in population density relative to resources C. decision-making processes used by tribal leaders D. the dynamics of wild plant resources
After the Upper Paleolithic, people began to utilize the food resources of the environment more extensively. This period is known as the:
A. Mesolithic B. Neolithic C. Modernolithic D. Greater Paleolithic
Sexual dimorphism is a difference between the sexes of a species in:
A. intellectual growth. B. the size of canine teeth. C. body size or shape. D. the display of emotion.