Nitrogen-fixing bacteria are important a. they turn nitrogen from the air into nitrogen compounds in the soil. b. they are essential for plants being able to carry out photosynthesis. c. they break up dead animals in the soil. d. they release nitrogen from the soil into the atmosphere.

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

All eukaryotic cells contain small bodies called

If a grape were placed in a hypertonic solution what would happen and why?