Principles of Biology
Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 28, Problem 3TY
Summary Introduction

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An imaginary line where somethingcouldbe folded in half and one half would match the other half is called symmetry. There are three types of symmetry in biology. These are bilateral symmetry, radial symmetry and asymmetrical. In bilateral symmetry, the body of the object is divided into halves that form mirror images. If more than one line is drawn to divide an animal or a plant in half, and each of these lines run through a central point on the animal or plant, then the animal has radial symmetry. If an animal or plant has no symmetry at all, it is called asymmetrical. Apical is related to shoots, stems and the upward part of the plant. Basal is the bottom part of the plants related to the roots of others.

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