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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 18, Problem 13SQ
Textbook Problem
15 views

All of the following data types can be used as evidence of shared ancestry except similarities in _______.

  1. a. amino acid sequences
  2. b. embryonic development
  3. c. DNA sequences
  4. d. fossil morphologies
  5. e. form due to convergent evolution

Summary Introduction

Concept introduction: Existence of a common ancestry has been discovered by many scientists with clear evidence from their research in several disciplines. It uses similarities in fossil evidences, embryonic developmental pattern, DNA sequences, and amino acid sequences for arriving at a conclusion of the existence of a common ancestor.

Explanation of Solution

Reason for correct answer:

Scientists use several disciplines of life for finding out the origin of life. It is a common belief that all cellular life forms on earth have a common origin, and many scientists have given several proofs to strengthen this concept by giving the following evidences like the common similarities in the embryonic development of distinctly different species, similarities of DNA sequences, amino acid residues, and the fossil morphology. Convergent evolution reveals the simultaneous evolution of several new structures in different unrelated groups of organisms.

Option e. is given as “form due to convergent evolution”. Similarities produced due to convergent evolution cannot be used as an evidence for common ancestry.

Therefore, the option e. is the correct answer.

Reasons for incorrect answers:

Option a. is given as “amino acid sequences”. There are many scientists, who used these sequences from different groups of organisms for finding out the common similarities shared by them for proving the concept of common ancestry...

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