Although most thunderstorm cells complete their life cycle in 30 minutes, thunderstorm weather may persist at a specific location for 6 to 12 hrs or longer. explain why

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.

After getting the slide and microscope ready, stella is eager to see the microscopic pond water specimen! she crouches around her microscope and aligns her eye with the microscope’s eyepiece. but she's only able to see a bright white light. at this point, no specimens or cells are visible on stella's pond water slide. after taking a moment to collect her thoughts, stella realizes she can't see any lifeforms because .

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.