Which conditions are required for natural selection?

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

How does the carbon cycle involve an exchange of carbon

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.