EVOLUTION
HISTORICAL CONTEXT FOR EVOLUTIONARY THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the environment is a selective pressure
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they lead to competition within species
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they lead to random changes in the population that can influence natural selection.
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Detailed explanation-1: -Natural selection is a non-random difference in reproductive output among replicating entities, often due indirectly to differences in survival in a particular environment, leading to an increase in the proportion of beneficial, heritable characteristics within a population from one generation to the next.
Detailed explanation-2: -Random forces lead to genetic drift These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over time. Typically, genetic drift occurs in small populations, where infrequently-occurring alleles face a greater chance of being lost.
Detailed explanation-3: -Evolution is possible when there is variation in the genetic makeup among organisms that affects their traits. Then, if certain individuals in a population reproduce more successfully than others so that their traits become more common within the population, the result is evolutionary change.
Detailed explanation-4: -Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success. This process causes species to change and diverge over time.