Simple Animals: Investigating Mollusks

The video explains that molluscs, such as clams, squid, and mussels, are invertebrate animals. Most molluscs have hard external shells, while some, like squid, have internal shells, and others, like slugs, have no shells. Molluscs possess well-developed nervous systems, including a brain and sense organs like eyes.

Which of the following animals is a member of the mollusca group?

• Eagle

• Clam

• Frog

• Shark

What is a common feature of most molluscs like oysters and clams?

• They have wings.

• They have hard external shells.

• They can fly.

• They have fur.

Which mollusc is known to have an internal shell?

• Oyster

• Slug

• Snail

• Squid

What is a characteristic of slugs in terms of their protective features?

• They have a hard external shell.

• They have an internal shell.

• They do not possess shells.

• They have a soft external shell.

What is a notable feature of the nervous system in molluscs?

• They have a well-developed nervous system.

• They lack a brain.

• They have a simple nervous system.

• They have no sense organs.