Q. The earthworms, insects and snails are

 2012  189 EAMCETEAMCET 2000 Report Error

Solution:

When mouth arises from blastopore and cleavage is spiral and determinate. This condition is called protostomia and the animal having this condition are called protostomes. The animal of phylum Protozoato phylum Mollusca are protostomes. Thus. earthworm, insects and snails are protostomes.