Which process made an increase in chemical energy for cell activities in organisms living on the earth possible?
a change from a primitive atmosphere, which was about 70 percent nitrogen, to
an atmosphere that was 70 percent oxygen
the development of plants that could add more water vapor to the atmosphere,
increasing the earth's water supply
the discovery of ATP and ADP by scientists for use in the metabolic processes of
cells
a change from a reducing atmosphere where there was no free oxygen to an
oxidizing environment where free oxygen was abundant

Scientific method and data analysisa biology student wanted to determine if there is a relationship between resting heart rate and bodyheight. she gathered information from 12 classmates and constructed the table below. resting heart rate (beats per minute)student height (cm)155. 156156165180180190194195

The endoplasmic reticulum (er) is an organelle in some cells. in these cells, it is continuous with the nuclear membrane and forms a large part of the cell\'s total membrane. sort the phrases below as describing rough er, smooth er, both, or neither. note: if you answer any part of this question incorrectly, a single red x will appear indicating that one or more of the phrases are sorted incorrectly.1) found in prokaryites and uekaryotys2) involved in protein synthesis3) involve in lipid synthesis4) contains molecular chaperones in lumen5) bound with ribosomes6) involved in toxin or drug metabolism7) large systemot internnected tubules, vesicles, and sacs8) "packages" enzymes in vesicles for secretion.

In a cladogram' when does a group of organisms branch off