Which of the following animals has a hard calcareous shell?
Nereis
Shark
Bivalve
Herdmania
Bivalve
Explanation:
Sketch, labell and classify Octopus.
My body is soft and slimy, hence I am referred as ____________.
Arthropoda : Largest phylum : : Mollusca : ______________
Ctenidia are respiratory organs in ______.
List the respiratory organs of amphibians.
The animals belonging to phylum ______ are said to be soft-bodied.
The name ______ means “a thousand legs”.
Cuttlefish is a member of this phylum:
Phylum molluscs can be distinguished from other invertebrates by the presence of
Mention one example each for animals with chitinous exoskeleton and those covered by a calcareous shell.
What is the role of radula in molluscs?
Differentiate between direct development and Indirect development
Match the following and write correct choice in space provided
| Animal | Characteristics |
| a. Pila | i. Jointed appendages |
| b. Cockroach | ii. Perching |
| c. Asterias | iii. Water vascular system |
| d. Torpedo | iv. Electric organ |
| e. Parrot | v. Presence of shell |
| f. Dog fish | vi. Placoid scales |
a. ______, b. ______, c. ______
d. ______, e. ______, f. ______
