How do nonchordate metazoans regulate the water content of their body?

Strobilation

List any five types of beneficial products obtained from nonchordates. Explain the process of production of any two of these products.

With the help of examples explain the types of symmetry found in animal world.

Discuss the communication behaviour found in nonchordates.

How do nematodes cause harm to plants and humans? Describe.

Write the classes of phylum Mollusca with one characteristic feature and one example of each.