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5. Abiotic components of the ecosystem include
a. Sunlight c. Algae
b. Bacteria d. Planktons
6. DDT stands for _______________________.
a. dichloroditrichloroethane c. dichlorotriphenylethane
b. dichlorodiphenyltrichloroethane d. none of the above
7. Thomas Robert Malthus described the population growth as _________
a. increasing c. decreasing
b. exponential d. unchanging
8. A specialist, who studies, collects and analyses data about environmental problems.
a. Environmentalist c. Botanist
b. Environmental Scientist d. Geologist​