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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 19, Problem 3SQ
Textbook Problem
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Stanley Miller's experiment demonstrated that _______.

  1. a. Earth is more than 4 billion years old
  2. b. under some conditions, amino acids can assemble spontaneously from inorganic materials
  3. c. oxygen is necessary for all life
  4. d. RNA was the first genome

Summary Introduction

Concept introduction: Stanley Miller and Harold Urey tested the hypothesis that lightning can power the synthesis reactions in the early earth atmosphere. For the stimulation of the process, a reaction chamber was filled with methane, ammonia, and hydrogen gas. The reaction chamber was zapped with sparks from the electrodes.

Explanation of Solution

Reasons for the correct statement:

From the experiment, Stanley Miller demonstrated that many organic molecules like the amino acids are formed from the living things. Lightning is stimulated by the sparks from the electrodes and the chamber was filled with methane, ammonia, and hydrogen gas for the stimulation of the process.

Option b. is given as “under some conditions, amino acids can assemble spontaneously from inorganic materials”. As amino acids are formed spontaneously, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “Earth is more than 4 billion years old”.

According to the Big Bang theory, universe began about 13.7 billion years ago and the gradual build up of the materials had formed the earth 4.6 billion years ago. Therefore, option a...

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