Give the characteristics of flatworms, algae, round worms. Give their phylum too.
Flat worms Phylum - Platyhelminthes Dorsoventrally flat, i.e. flat body from top to bottom. No true body cavity. Mostly hemaphrodite, i.e., male and female sex organs present in the same individual. Round worms Phylum - Nematoda Body is cylindrical. Pseudocoelom (Sort of body cavity). Sexes are separate. Segmented worms Phylum - Annelida Body is segmented from head to tail. True body cavity. May be unisexual or bisexual.
