Question

Give four distinguish feature between phylum annelida and phylum mollusca

Answer 1

1. In annelids to segmentation is present while in mollusca no true segmentation.except neopilina
2. in annelids usually close circulation system is present except leech while in mollusca usually open circulatory system is present except cephalopods
3. In annelids only sexual reproduction is present while in mollusca both sexual and asexual reproduction is present
4. In annelids excretion by malpighian tubules while in mollusca excretion by gills