Which Phylum Has a Unique Water Vascular System That Usually

question 122

Multiple Choice

Which phylum has a unique water vascular system that usually includes tube feet that can be used for movement?

• A) Echinodermata
• B) Hemichordata
• C) Chordata
• D) Cnidaria

---

Definitions:

Dependent Variable

In scientific research, the variable that is tested and measured; it is 'dependent' on the independent variable.

Fat Layer

A layer in the body composed primarily of adipose tissue, which stores energy and insulates and cushions the body.

Polar Bear's Skin

The black skin of a polar bear, hidden beneath its transparent, hollow fur, which helps in absorbing sunlight to keep the bear warm in cold environments.

Tissue

In multicelled organisms, specialized cells organized in a pattern that allows them to perform a collective function.