Garden near my house

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Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time

What makes a dominant allele different from a recessive allele

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone