El Nino is caused by water at the equator near the Eastern Pacific ocean becoming warm. This warmness causes the water to vaporize and rise up. Similarly, the water also makes the atmosphere warm, allowing the moisture-rich air to develop into fierce rains, ultimately causing the increased precipitation during that year. The El Nino year 1997 is a famous example of this event.
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Explanation: because they caused redistribution between continents, create volcanos and mountains that help populations adapt
Answer:
Meiosis is important because during sexual reproduction, it ensures that all produced organisms have the correct number of chromosomes. It is also responsible for producing genetic variations during the process of recombination, and it repairs some genetic defects.
The disadvantage from not having the trait normally arises only after the reproductive stage of the individual's lifecycle is mostly over. This is a special case of "no strong pressure", because evolution selects genes, not the organism. In other words the beneficial mutation does not alter the reproductive fitness.
Explanation:
Meiosis is important because during sexual reproduction, it ensures that all produced organisms have the correct number of chromosomes. It is also responsible for producing genetic variations during the process of recombination, and it repairs some genetic defects.
Grasshoppers have an exoskeleton.
Tapeworks have a hydroskeleton.
Crocodiles have an endoskeleton.