Chapter 25, Problem 11A

Summary Introduction

To replace:

The correct term in the place of italicized term.

Introduction:

The parasites are the organism that live in association with the other organisms and feed on them. There are many parasitic adaptations that different organisms evolve. The round worms are intestinal parasites.

Explanation of Solution

The round worms are called so because their body is cylindrical and long. They are bilaterally symmetrical. The ends of the worms are tapered or pointy at both ends. They are intestinal parasites and they are not involved in active movements. So, their body lack segmentation. Hence, the word segmented can be replaced with unsegmented in the given statement.