Which of the following is NOT a principle included in the modern cell theory? A. New cells are formed only by division of a preexisting cell B. The cell is the basic unit of structure and function for all organisms C. Living cells appear spontaneously from nonliving matter D. All living things are composed of one or more cells

Which of the following systems in absorbing oxygen and releases carbon dioxide

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point