Why do all plants contain chlorophyll?
Chlorophyll is a pigment that makes photosynthesis in the plant and without photosynthesis there would be no glucose, oxygen, and water from the plant and the plant would ultimately die
v We all know that green plants are green because they contain chlorophyll; we know that chlorophyll is green. Hang on; why are plants different shades of green if they all contain the same green pigment? Well, perhaps it is not quite as simple as you were told by your biology teacher. In fact there are several different kinds of chlorophyll and some other photosynthetic pigments in green plants. So exactly what colour they are…
Plants that are unlucky enough to loose all of their chlorophyll will not be able to produce glucose through photosynthesis and will die. This is happens if the entire plant looses chlorophyll; there are other examples of plants (such as white variegated ones) where only certain portions of the leaf have no chlorophyll, in these instances the food is produced and distributed from the areas that do contain chlorophyll to those which don't.