What effects would el niño most likely have on organisms? check all that apply. 1)el niño would lead to the extinction of a species. 2)el niño would lead to the death of organisms or populations. 3)el niño would cause changes in the genetic makeup of organisms. 4)el niño would cause continents to move to different parts of the planet. 5)el niño would cause organisms to move in search of food and better conditions.

The answer is; 1, 2, 3, 5

El Nino involves very wet weather condions that cause extensive flooding. The floods of an El Nino can damage habitats,  kill organisms and destroy most of the resources required to sustain an initial popualtion size. El Nino might also wipe out a large proportion of a population. This, therefore, wipes out a large proportion of alleles from the population. If the population was very small, there will be a dramatic shift in allele frequency since the small population left (with very low allelic variability) will have the responsibility of repopulating. This is called the bottleneck effect.  

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