A population crash occurs when
a. A population approaches its carrying capacity.
b. Environmental resistance comes into play gradually.
c. Resources are essentially unlimited.
d. A population greatly overshoots carrying capacity, and resulting environmental pressures cause effects.
e. The population growth rate slows.
D
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All modern reptiles are ____
A)ectotherms B)endotherms C)echinotherms D)unitherms E)antitherms
Fragile states Somalia and Haiti share
A) widespread extreme poverty, lack of a functional governments, and are conflict-prone. B) low total fertility rates, moderately strong economies, and incomes from ecotourism. C) an aging population, many female political leaders, and are conflict-prone. D) fairly high per capita income, many exports but no imports, and a lack of functional government.
Laterite soils are most likely to develop in:
a) Climates with high temperature and low rainfall (deserts) b) Climates with high temperature and high rainfall (tropical climate) c) Climates with low temperature and low rainfall (arctic climate) d) Both in "a" and "c" but not in "b" e) None of the above answers are correct
________ elements make up 98% of the Earth's crust.
A. Twenty B. Eight C. Ninety-two D. Fourteen E. Two