GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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variations
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pollution
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predation
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artificial selection
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Detailed explanation-1: -Both environmental and genetic effects contribute to phenotypic variation within and among populations.
Detailed explanation-2: -Sometimes the environment changes a gene-either its DNA sequence or its activity level. Either of these effects can change the proteins that are made from a gene, which in turn affects traits. Some harmful environmental factors can change a gene’s nucleotide sequence. For example, UV radiation can break DNA strands.
Detailed explanation-3: -These forms of variation are caused by factors found in the environment. The most important of these factors include lifestyle (diet and exercise), temperature and water level. For plants, light levels could also be included.
Detailed explanation-4: -Variation refers to the differences between members of the same species. Having variation within a species means that if the environment changes there may be individuals within the species more able to withstand the change and survive.