EVOLUTION
EVIDENCE FOR EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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has variation and the environment changes
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has little variation and the environment changes
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has variation and the environment stays the same
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has little variation and the environment stays the same
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Detailed explanation-1: -Genetic variation is the raw material of evolution. Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction.
Detailed explanation-2: -Extinction occurs when species are diminished because of environmental forces such as habitat fragmentation, climate change, natural disaster, overexploitation by humans, and pollution, or because of evolutionary changes in their members (genetic inbreeding, poor reproduction, decline in population numbers).
Detailed explanation-3: -Changes in the environment, such as temperature, rainfall, and other factors, can cause species extinction. Extinction can be caused by the melting of ice caps, forest fires, and global warming. Coextinction may occur as a result of the extinction of the species on which a species depends.
Detailed explanation-4: -The main modern causes of extinction are the loss and degradation of habitat (mainly deforestation), over exploitation (hunting, overfishing), invasive species, climate change, and nitrogen pollution.