Co2 is returned to the atmosphere by all methods except question 19 options: combustion. decomposition. photosynthesis. respiration.

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

9. the history of life on earth is recorded in

In each transformation of energy , some energy what?