Chapter 23, Problem 4FTB

Summary Introduction

To review:

The given blank space in the statement, “lophotrochozoans and ecdysozoans (molting animals) are two large clades of animals that exhibit _____________ development. The other major type of development found in bilateral animals is known as ____________ development, and is present in animals in the clades known as ______________and______________.”

Introduction:

The symmetrical animals either have radial or bilateral symmetry. These animals have true tissues. The difference between bilaterally and radially symmetrical animals denotes a specific branching point in the evolutionary tree of animals.