What is the best description of the evolution of camouflage by natural selection?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen