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Biology: The Unity and Diversity o...

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

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Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 22, Problem 11SQ
Textbook Problem
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The gametophytes of ferns ___ .

  1. a. are photosynthetic
  2. b. produce spores in sori
  3. c. are diploid
  4. d. are dependent on the sporophyte for nutrition

Summary Introduction

Introduction: Ferns are the diverse seedless vascular plants with well defined internal vein structures. Unlike 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 dominant.

Explanation of Solution

Reason for the correct statement:

Ferns reproduce by means of spores produced in capsules known as sori on the underside of the leaf of the fern. After ripening of spores, they are released from sori, and are dispersed through wind. After the spore germinates, it forms gametophyte that is photosynthetic. The sperm and egg cells form on the underside of gametophyte and after fertilization, a diploid zygote is formed. This forms the embryo which develops into a sporophyte. The embryo depends on gametophyte for water and nutrients.

Option a. is given as “photosynthetic”. Hence, option a...

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