BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ecologists have been studying populations in tropical regions to determine the effects of DDT on aquatic systems. Which population would you expect to show the most effects?
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phytoplankton
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small benthic fish
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zooplankton
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larger schooling fish like tuna
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predatory birds like pelicans
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Explanation:
Detailed explanation-1: -Synergistic interactions are NOT the cause of high concentrations of DDT in fish-eating birds.
Detailed explanation-2: -Which statement best illustrates limitations to determining the toxicities of environmental chemicals? Humans are exposed to just one chemical; they are exposed to a mixture of chemicals that may produce synergistic effects.
Detailed explanation-3: -Why was DDT intentionally released into the environment? It was applied in swamps to kill mosquitos that spread malaria. When was DDT banned in the United States?
There is 1 question to complete.