What are the four characteristics common to most animals?

Compare closed and open circulatory system.

Choose the term that does not belong in the following group and explain why it does not belong? Notochord, cephalisation, dorsal nerve cord and radial symmetry.

What are flame cells?

What is Pseudocoel?

Name some parasitic adaptations seen in flatworms.

Difference between Male and Female round worm.

Explain metamerism.

Why are Echinoderms so-called?

What is the salient feature of Phylum Echinodermata?