EVOLUTION
DARWIN’S THEORY OF NATURAL SELECTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a way of measuring time
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a change in the traits of a species over time
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a change in the population size of a species
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a change in the climate of a region
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Detailed explanation-1: -Evolution is the change in inherited characteristics or traits in a population of organisms over many generations. The mechanism that best explains evolution is a phenomenon known as natural selection.
Detailed explanation-2: -Evolution is a process that results in changes in the genetic material of a population over time. Evolution reflects the adaptations of organisms to their changing environments and can result in altered genes, novel traits, and new species.
Detailed explanation-3: -Formally, evolution is a change in allele frequencies in a population over time, so a population in Hardy-Weinberg equilibrium is not evolving.
Detailed explanation-4: -Definition. Evolutionary change is the heritable change in populations and species over time, due to mechanisms such as natural selection, random genetic drift, and sexual selection.
Detailed explanation-5: -Trait evolution is not predictable. However, once a lineage becomes fixed for a derived trait, descendants of that lineage will all have the derived trait unless there is a subsequent evolutionary change to a new trait (which might even resemble the original ancestral trait).