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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Apply Evolutionary Thinking Large animals (such as many of the vertebrates described in this chapter) often have more types of specialized tissues and organ systems than do small animals (such as flatworms). Why would natural selection favor the evolution of additional tissue types and organ systems in larger organisms?

Summary Introduction

To review:

Natural selection favors the evolution of additional tissue types and organ systems in larger organisms.

Introduction:

Natural selection is the process governed by nature where nature selects the beneficial traits and eliminates the harmful ones. Evolution is a developmental process, where there is a development of new trait or a new organism, which is accomplished by the change in inherited characters, which leads to the development of a new species.

Explanation

The advantage of additional tissue types and organ systems in large multicellular organisms over unicellular organisms is as follows:

1. In unicellular organisms, all the life processes like respiration, reproduction etc. are performed by a single cell whereas in multicellular organisms, the life processes are performed by different tissues, organ, or organ system. That means there is division of labor in multicellular organisms.

Different teachers teach different subjects, it can be taken as an example: A single teacher cannot teach all the subjects efficiently as he is not the master in all the subjects; he is specialized only in a single subject...

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