Chapter 24, Problem 11A

Summary Introduction

To write:The distinguish between the given vocabulary terms.

Introduction:All animal cells, excluding sponges, are divided into structural and functional units which are called tissue. Tissue is a collection of cells specialized in performing a particular purpose.Symmetry describes the resemblance or balance of species body systems. An animal's kind of symmetry has helped it to move in some ways.

Explanation of Solution

The difference between radial and bilateral symmetry is given as follows:

Radial symmetry	Bilateral symmetry
·An organism with radial symmetry can be divided into approximately equal halves along either plane, with a central axis.	An organism with a bilateral symmetry can be separated into mirror image halves around the central axis and in one plane.
·All organisms with radial symmetry grow from only two layers of embryonic cells-the endoderm and the ectoderm.	Most organisms with bilateral symmetry have three layers of embryonic cells-the ectoderm, the endoderm, and the mesoderm.