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Biology: The Dynamic Science (Mind...

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

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892
Chapter 28.1, Problem 2SB
Textbook Problem
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Describe the difference between homospory and heterospory, and explain how heterospory paved the way for other reproductive adaptations in land plants.

Summary Introduction

To review:

The difference between homospory and heterospory. Also explain how the heterospory paved the way for other reproductive adaptations in land plants.

Introduction:

The spore formation in early plants includes haploid gametophytes, which are long-lived, and diploid sporophytes, which are short-lived. The haploid gametophyte is smaller in size, less complex, and has a shorter existence. This difference was mainly due to the plants being homosporous and heterosporous in nature.

Explanation of Solution

The differences between Homospory and Heterospory are given as follows:

Homospory Heterospory
The production of only one type of spore takes place in a homosporous plant. The production of two different types of spores in two different types of sporangia occurs in a heterosporous plant.
It has a bisexual gametophyte. It has sexually different gametophytes.
It occurs in bryophytes, which are seedless and vascular. It occurs in seed-containing plants and some pteridophytes...

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