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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 19, Problem 2SQ
Textbook Problem
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An abundance of _______ in Earth's early atmosphere would have interfered with assembly of organic compounds.

  1. a. carbon dioxide
  2. b. ammonia
  3. c. water
  4. d. oxygen

Summary Introduction

Concept introduction: Organic molecules can be formed in the absence of life. The simple organic compounds have formed in the Earth’s early atmosphere due to the lack of oxygen. Due to this, the organic compounds have persisted longer than today in the early atmosphere.

Explanation of Solution

Reasons for correct statement:

The Earth’s early atmosphere was oxygen free, and it helps in the accumulation of simple organic compounds.  If oxygen was present, it would have oxidized the organic molecules as soon as they form making the origin of life not possible on earth.

Option d. is given as “oxygen”. As the abundance of the oxygen in early atmosphere might have interfered with organic compound formation, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “carbon dioxide”.

Carbon dioxide does not have the ability to oxidize the organic compound...

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