Flatworms have layers of tissue that surround the gut and organs in one solid body. they are
a. acoelomates
b. pseudocoelomates
c. coelomates

a. Acoelomates. Flatworm is a type of acoelomate animal; they have no body cavity or ceolom but they have mesenchyme in their body cavity that surrounds the gut and organs in one solid body.

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.