Identify the point in mitosis at which separase cleaves the protein complex that holds sister chromatid pairs together. In normal cells, separase is kept in an inactive state until it is needed. Explain how the progression of cells past sequential cell cycle checkpoints and the activity of enzymes such as separase is controlled by interactions between two major groups of regulatory proteins.
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Ответ:
A. Air pollution
Explanation:
As much as people talk about meteor hitting the earth and volcanoes exploding with stuff. The real thing that killed everything wasn't the volcano eruptions. It was the air pollution after the volcano and everything else combined destroying all the dinosaurs because, no of them could breathe.