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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 8SQ
Textbook Problem
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Coal consists primarily of compressed remains of the ___ that dominated Carboniferous swamp forests.

  1. a. seedless vascular plants
  2. b. conifers
  3. c. flowering plant
  4. d. hornworts

Summary Introduction

Introduction: The first vascular plants dated about 450 million years ago, during late Ordovician period. They were short plants without leaves and roots. The existence of oldest forest dates back to about 385 million years ago, consisted of some tall seedless vascular plants. During Carboniferous period (359-299 million years ago), tall seedless vascular plants dominated vast areas of swampy forests.

Explanation of Solution

Reason for the correct statement:

After the formation of Carboniferous swamp forests containing seedless vascular plants, there was a change in climate and sea level. Forests flourished when sea water receded and when the water level rose; the trees got submerged and buried in sediments. They accumulated on each other and as a result of compaction generated heat. With the passage of time and due to heat and pressure, these compact remain transformed into coal. Thus, coal mainly consists of compressed remains of the seedless vascular plants.

Option a. is given as “seedless vascular plants”.

Hence, option a. is correct.

Reasons for the incorrect statement:

Option b...

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