Do multicellular organisms develop, and if they do explain.

yes

Explanation:

Development in multi-cellular organisms happens in one of three ways

1) Number of cells increase

2) Size of existing cells increase

3) Both happen at the same time

1 ex -When you get a cut your existing cells replicate to heal the wound by simply replicating.

2 ex-There are sea slugs that consume plant life and then add the chloroplast to the existing cells on its back in order to create organic solar panels.

3 ex-When mammals are maturing the sexual systems both increase in size (increase in cell number) and become functional (development of new cell types through DNA sequences that were lying dormant)

c

explanation:

not sure if this what   you'r looking for would be percent composition