Simple Animals: Worms

The video tutorial explores the diversity of worms, focusing on three major groups: flatworms, roundworms, and segmented worms. It highlights the unique characteristics of each group, such as the advanced nervous system of flatworms, the digestive system of roundworms, and the segmented body structure of annelids. The tutorial also explains bilateral symmetry and the feeding habits of leeches.

What is a distinctive feature of flatworms that differentiates them from nidarians?

• They are parasitic.

• They have a segmented body.

• They possess bilateral symmetry.

• They have a closed circulatory system.

Which of the following best describes the digestive system of nematodes?

• No digestive system.

• A one-way digestive system.

• A two-way digestive system.

• A segmented digestive system.

What is a key characteristic of annelids that distinguishes them from other worm groups?

• They have a simple nervous system.

• They lack a circulatory system.

• They have a segmented body.

• They are flat in shape.

Which type of worm is known for having a closed circulatory system?

• Segmented worms

• Nidarians

• Roundworms

• Flatworms

Leeches, a type of annelid, are known for feeding on what?

• Plant material

• Blood of other animals

• Small insects

• Algae