OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Population can evolve, not individuals
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Natural selection only involves individuals, not populations
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Genetic changes only occur in populations
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A population’s gene pool remains the same throughout time
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Detailed explanation-1: -Individual organisms don’t evolve. Populations evolve. Because individuals in a population vary, some in the population are better able to survive and reproduce given a particular set of environmental conditions.
Detailed explanation-2: -The unit of evolution is population as it is the smallest unit of living organisms that can undergo evolution. A population is considered to be a “pool” of genes and gene types that are responsible for the genetic diversity of all the individuals within the group.
Detailed explanation-3: -A population is a group of individuals that can all interbreed, often distinguished as a species. Because these individuals can share genes and pass on combinations of genes to the next generation, the collection of these genes is called a gene pool.
Detailed explanation-4: -Natural selection occurs when environmental pressures favor certain traits that are passed on to offspring. The “big prize” in natural selection is passing on genetic information. Natural selection acts on populations. Individuals do not evolve in genetic evolutionary terms.