How do some cells make food molecules

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

Several billion years ago which gas was the least prevailant in the atmosphere

If a checkpoint detects damaged dna, the checkpoint may