Answer:
The pyrenoid, a dense structure inside or beside chloroplasts of certain algae, consists largely of ribulose biphosphate carboxylase, one of the enzymes necessary in photosynthesis for carbon fixation and thus sugar formation. Starch, a storage form of glucose, is often found around pyrenoids.
<span>The large rounded brain near the center of
the cell is the nucleus. It is known as the brain because it is responsible for
most of the cell functions. Similarly to the human brain, the nucleus sends
information and instructions to the cell.</span>
DNA is present in all human cells, except the red blood cells, that is because <span>RBCs do not contain the organelle nucleus or any other DNA containing organelle.</span>
Answer:
So where then did all the carbon that living organisms are built of come from? It turns out that most of the carbon we use today came from a collision with another smallish planet about 4.4 billion years ago.