What's the definition for nutrients

When analyzing tree rings, what do scientists assume a thin ring indicates?

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

Albinism is an inherited genetic disorder. explain what it is meant by inherited genetic disorder