Achemical reaction will change one substance into another by
a)changing the nucleus of the atoms
b)dissolving a solute into solution
c)breaking and forming chemical bonds
d)tightening the electrons inside atoms of elements

C) breaking and forming chemical bonds.

When two or more substances react together, they form chemical bonds with each other.

Eukaryotic cells are theorized to have evolved from prokaryotes called the endosymbiotic theory. this explains that the most primitive eukaryotic cell engulfed a prokaryotic cell (by the process of phagocytosis) that is capable of cellular respiration and another prokaryotic cell that is capable of photosynthesis. these prokaryotic cells eventually became organelles and these organelles are the mitochondria and the chloroplast