Question

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Biology (3) a Soru 33 Henüz cevaplanmad 3,00 zerinden isaretlenmis Soruyaretle Which type of mechanism does affect the evolution of a population that 90% wiped out in a forest fire. Lütfen birini seçin: O A. Founder effect o B. Bottleneck effect o C. Natural selection a D. Artificial selection Onceki sayfa Sonraki sayfa a 1W Son

Answer 1

The answer is option B(Bottle neck effect)

•Bottleneck effect: When natural calamities such as earthquakes volcanoes,floods etc reduce the size of the population drastically.

•After these calamities the lucky survivors may be genetically different from their original population in genetic makeup. This condition is known as Bottleneck effect.

The lucky survivors form a new population.

•Founder effect: The individuals of a population isolate from the main population and form a new population.The individuals of the new population are more genetically related to the founders of new population rather than the individuals of the main population.

•Natural selection:According to theory of Natural selection, evolution is a gradual process rather than a sudden biological event.The individuals possessing harmful variations are reproductively less successful and those with beneficial variations would increase the ability to reproduce and leave more fertile offspring.

•Artificial selection doesn't occur through natural calamities.