The process of plant respiration
a.
uses all the energy released during photosynthesis.
b.
releases energy that plants can use for life processes.
c.
releases oxygen to earth's atmosphere.
d.
produces food that plants need for photosynthesis.

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.