What job does each organelle do in a cell?

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases, x and y. it was not possible to break down the gases x and y into simpler particles.

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a