Quarter Test Study Guide--Ch. 1-2

Most crustaceans have ____ body regions.

When the head and thorax are joined together, the body region is called the ____.

Many crustaceans have ____ legs.

Most crustaceans breathe with ____.

A centipede has ___ pair of legs on most body segments.

By releasing poison through the stink glands along the sides of its body near its many legs, the ___ defends itself.

Worms are not arthropods because they do not have a ___, a protective outer covering.

Earthworms enrich the soil with their ___

The stiff bristles on the body of the earthworm are called ___.

The threadlike structures in a cell that determine the characteristics of the organism and how it runs are the ___.