What percent of the earths land area does north america cover

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

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 molecules does hemoglobin decay into over time