Why is it important for the nuclear membrane to disintegrate during mitosis?

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

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

The diagram shows a chicken embryo and a human embryo