Which term identifies proteins that allow muscles to shorten or lengthen?

What causes temperature extremes in the desert

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Consider this plant cell which organelle is labeled g