Chapter 30, Problem 13STP

Summary Introduction

To determine:

The adaptation of the casting out internal organs by the sea cucumber is unique to the organism.

Introduction:

Sea cucumbers are the organism that belong to the echinoderms. They have a special ability to cast their internal organs out, which help them in scaring the predators.

Explanation of Solution

The sea cucumbers unlike the other echinoderms, they have a soft body and they have a lot of collagen in their covering. Other echinoderms have hard shells and they possibly could not cast out the internal organs. Hence, sea cucumbers are the only echinoderm that can cast out the organs.