One class of pollutants that can cause excessive growth of algae is
a. radioactive substances
b. oxygen-demanding wastes
c. plant nutrients
d. organic chemicals
e. Sediment
C
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The three principles of sustainability are:
a. solar energy, biodiversity and perpetual energy b. use of natural capital to support human economies c. use of renewable resources, but no use of nonrenewable resources d. solar energy, biodiversity and chemical cycling e. biodiversity, use of perpetual resources and widespread reduction of use
Countries like Singapore and Indonesia experience high rainfall and high temperature throughout the year because
A. they are islands. B. they are located in the equatorial zone. C. they experience tropical monsoon climate. D. daily wind reversals keep temperatures high and bring heavy rainfall.
Which of the following is an example of a second order of relief?
A) the North American plate B) Pike's Peak C) the Canadian and American Rockies D) Mt. Capulin
In an aquatic ecosystem, sedges and grasses are often found in central deeper portions of the body of water.
Answer the following statement true (T) or false (F)