BuyFind

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
BuyFind

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

Solutions

Chapter
Section
Chapter 8, Problem 4SQ
Textbook Problem
1259 views

One species’ DNA differs from others in its _____.

  1. a. nucleotides
  2. b. DNA sequence
  3. c. double helix
  4. d. sugar–phosphate backbone

Expert Solution
Summary Introduction

Concept introduction: DNA sequences make up the genome of the organisms. The DNA sequence of the organism remains same in all cells. The changes in DNA sequences and the length of the DNA sequences are the basis for diversity of life. The changes in DNA sequences lead to changes in the traits. When several new traits accumulate in an organism, they lead to a new species, a process known as speciation.

Explanation of Solution

Reasons for the correct statement:

A particular order of nucleotides in the DNA is known as the DNA sequence. The species differ by the DNA sequences in their nucleus. The difference in the DNA sequences affects the traits and gene expression. The DNA sequences vary between species based on their length and order or nucleotides

Option b. is given as “DNA sequence”

As DNA sequences is the underlying differences between the two species, thus option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “nucleotides”.

Deoxyribonucleic acid (DNA) is made of purines, pyrimidines that form nucleotide bases. The DNA is passed on to the next generation through the gametes. The purines are adenine and guanine and pyrimidines are cytosine and thymine...

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