1. Radula is found in

2. Sharks, skates, and rays are also called ______ fishes.

3. Turtles are

4. The clam nervous system is composed of

5. Choose the correct pair.

6. Who wrote the book Systema Naturae?

7. Which of the following statement is correct?

8. Osteichthyes belongs to

9. Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?

10. Which one of the following phylum is characterized by absence of true coelom?