Cause of drug addiction.

How do the nuclei of covalently bonded atoms keep the bond together

Photosynthesis converts solar energy into what type of energy?

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