Why do countries with age-structure distributions similar to the leftmost type in Figure 2.11 ("Expanding Rapidly") have rapid population growth rates?
A. They have large numbers of girls who are about to become sexually mature
B. Most people in these countries are older than 15 years
C. Women older than 35 years are having more children in these countries
D. They have a larger ecological footprint
Answer: A
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Rain with a pH of 4.6 is
A) about 10 times more basic than rain from non-polluted regions. B) typical of regions with very low pollution. C) about 10 times more acidic than rain from non-polluted regions. D) about 100 times more acidic than rain from non-polluted regions.
A(n) ____ heating system, which is usually mounted on a roof or on special racks that face the sun, captures energy from the sun by pumping a heat-absorbing fluid such as water or an antifreeze solution through special collectors.
A. hydrogen B. active solar C. geothermal D. biofuel E. passive solar
Trophic structure refers to the pattern of food source and consumption in an ecosystem
Indicate whether the statement is true or false
What role does fire play in making mass wasting more severe during subsequent rains?
What will be an ideal response?