Which feature or later is the oldest rock layer diagram
1. G
2. A
3. B
4. M

What is thought to have caused the mass extinction at the end of the cretaceous period?

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.)chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.