The mass of a tree is primarily carbon. The carbon comes from carbon dioxide used during photosynthesis. During photosynthesis, plants convert the sun's energy into chemical energy which is captured within the bonds of carbon molecules built from atmospheric carbon dioxide and water.
The mass of an atom is contained in the nucleus.
<span>The
cells in this experiment were macrophages. These immune system cells
have many lysosomes for the destruction of bacteria and other invaders
brought into the cell via phagocytosis. The enzymes (hydrolases) that
carry out this catabolic activity are synthesized in the endoplasmic
reticulum, modified in the Golgi, and transported to the lysosomes.</span>
