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When organisms are classified ,they are given a two part name

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring