20 pts! place the following events in chronological order: a. the first cells appeared that could make their own food from sunlight. b. the ozone layer was formed. c. simple chemicals reacted to form new molecules. d. animals appeared. e. the first organisms appeared. f. humans appeared. g. the earth formed.

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

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

Easy 6th grade work! 100 points! i need fast! compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city, describe the parts of a cell and their primary function.