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The global air temperature increases after the volcanic eruptions. It has also been observed that this increase in air temperature causes lowered winter seasons, acid rain, haze, dust, and ash. This causes problems in breathing and other disorders in humans as well as animals.
If tall plants crossed with short plants give all tall, it means that the tall plants contain genes that dominate over the short ones.
We call the genes for tallness dominant.
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Explanation:
biology of your talking about life evolution but all if your talking about mankind evolution and technology