Mention the class of Cycas.

Mention the class of whales?

Mention the classes of Phylum Echinodermata with one example for each .

In Cycas.

Mention the classes of the phylum Mollusca or Echinodermata. Give their distinguishing features and examples.

Mention two classes of nucleases. Suggest their respective roles.

What are the types of RNA? Mention the role of each class of RNA.

Mention the fern characters found in Cycas.