BuyFindarrow_forward

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 16, Problem 13SQ
Textbook Problem
3 views

On the geologic time scale, life originated in the _____.

  1. a. Archean
  2. b. Proterozoic
  3. c. Phanerozoic
  4. d. Cambrian

Summary Introduction

Introduction: Geological time scale is the total life span on the Earth from its origin. It is also called as the calendar of the Earth, as it explains the relationships and timing of events that have taken place during the Earth's history. It can relate the rock layers with the time interval. The events are mainly classified into eons, eras, periods, and epoch. The eras are mainly divided into 4- Cenozoic, Mesozoic, Paleozoic, and Archean.

Explanation of Solution

Reason for the correct answer:

Archean eons (4 to 2,500 billion years ago) represent the origin of life on the Earth. During this event, many organisms including bacteria and archaea evolved. The formation of the Earth’s crust, first seas, and atmosphere took place in this period. The origin of life emerged by the molecular interaction, that is, by the conversion of the protocells into anaerobic single cells.

Option a. is given as, “Archean”.

Archean eons represent the origin of life on the Earth due to the origin of many organisms and formation of atmosphere and seas.

Hence, the correct answer is option a.

Reasons for the incorrect answers:

Option b. is given as, “Proterozoic”.

Proterozoic (2...

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Textbook Solutions

Find more solutions based on key concepts
Show solutions add
An eating pattern with sufficient essential fatty acids includes a. nuts and vegetable oils. b. 1/4 cup of raw ...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Name the following compounds: SO3 HNO2 Mg3N3 HI(aq) Cu3(PO4)2 CuSO45H2O

General Chemistry - Standalone book (MindTap Course List)

Name two essential fatty acids, and explain why they are called essential.

Chemistry for Today: General, Organic, and Biochemistry

A pendulum with a length of 1.00 m is released from an initial angle of 15.0. After 1 000 s, its amplitude has ...

Physics for Scientists and Engineers, Technology Update (No access codes included)

How does a weak electrolyte differ from a nonelectrolyte?

Introductory Chemistry: An Active Learning Approach

How was bathymetry accomplished in years past? How do scientists do it now?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin