In relation to a food chain, what do plants and photosynthetic algae have in common?

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

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?