6. Which continents all had matching layers of coal and why do you think this was
important?

What must be done to breed dogs for a partical trait

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

Environmental science are unconsidered with methods to preserve natural resourcesa.trueb.false