What would happen to Biston betularia if the predatory bird became extinct?

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

This is the process of making a prediction based on the results of prior observations of similar events.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these