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Early botanists admired ferns but found their life cycle perplexing. In the 1700s, they learned to propagate ferns by sowing what appeared to be tiny dustlike “seeds” from the undersides of fronds. Despite many attempts the scientists could not find the pollen source, which they assumed must stimulate these "seeds” to develop. Imagine you could write to one of these botanists. Compose a note that would clear up the confusion.

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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

Solutions

Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 22, Problem 1CT
Textbook Problem
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Early botanists admired ferns but found their life cycle perplexing. In the 1700s, they learned to propagate ferns by sowing what appeared to be tiny dustlike “seeds” from the undersides of fronds. Despite many attempts the scientists could not find the pollen source, which they assumed must stimulate these "seeds” to develop. Imagine you could write to one of these botanists. Compose a note that would clear up the confusion.

Summary Introduction

To compose: A note to clear the confusion in early botanists (1700) regarding the perplexing life cycle of ferns and the pollen source.

Introduction: Ferns are the diverse seedless vascular plants with well-defined internal vein structures. Unlike the flowering plants, they do not produce seeds or flowers. They reproduce through spores and pollinate through wind. They have alternation of generations with sporophyte generation being the dominant.

Explanation of Solution

Note to the early botanists:

Ferns are older than land plants and flowering plants. They do not produce flowers and therefore, do not produce seeds. They reproduce by means of spores produced in capsules known as sori on the underside of the leaf (fronds) of the fern. After ripening of the spores, they are released from sori, and are dispersed through wind. After the spore germinates, the seeds under the fronds form the gametophyte...

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