A human population living without medical care in a developing country would probably have ____
a. a rectangle-shaped age structure diagram
b. an r value < 0
c. a pyramid-shaped age structure diagram
d. per capita birth and death rates consistent with those of a stage 4 society
e. no density-dependent factors operating
ANSWER: c
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Indicate whether the statement is true or false.
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A. decrease. B. not change. C. increase. D. fluctuate by increasing and decreasing in a random fashion. E. drop until iron levels increase further.
An onion is an example of a ________
a. tuber b. bulb c. corm d. stolon
Crater Lake in Oregon formed as a result of a(n) ____ about 7,700 years ago
a. asteroid strike b. collapsed volcano c. massive earthquake d. continental shift e. shift in Earth’s axis