How does the earths atmosphere affect the earths biosphere ?

Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

Which structure in the cardiovascular system connect arteries to veins?