Why are all the different parts of the cells necessary

What is the importantence of the carbon and nitretan cycles in the environment

What is the compliment dna strand to the following sequence: ttgactaggcta

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