Question

distinguish between nematodes and annelida

Answer 1

Annelida: 1. They are bilaterally symmetrical. 2. They are triploblastic. 3. They have true body cavity. 4. They have segmented body in which segments are lined up one after the other form head to tail. eg: earthworm, leeches, nereis etc. Nematoda: 1. They are bilaterally symmetrical. 2. They are triploblastic. 3. They possess false body cavity or pseudocoelom. 4. They are unsegmented worms with both ends of the body pointed. eg: pin worm, round worm etc.