A student moves from a region that has short, cool summers and very cold winters to a region that has hot and humid summers but short cold winters. Both regions are located within which climate?

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

Which statement best describes how the nucleus, the rough endoplasmic reticulum, and ribosomes interact during protein synthesis?

How do the evolutionary chart and the video support the claim that all living things are made up of cells?