A man may ejaculate as many as 500 million sperm cells during intercourse, but only _____will survive the journey into the fallopian tube

After reading about the possible causes of

schizophrenia, a scientist thinks that a virus is the most likely cause. What term most accurately describes the scientist's idea? a) hypothesis b) dependent variable c) extraneous variable d) experimental estimate

In a resting neuron, which force pushes potassium ions into the cell?

A) The sodium-potassium pump B) Diffusion C) The action potential D) Saltatory conduction