Biology Now
Biology Now
1st Edition
ISBN: 9780393918922
Author: Anne Houtman, Megan Scudellari, Cindy Malone, Anu Singh-Cundy
Publisher: W. W. Norton & Company
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Chapter 10, Problem 1TQ
Summary Introduction

The biological evolution is the alteration in the features of an organism’s population over inherited generations. These features are due to the gene expressions that are distributed from parent to progeny throughout the reproduction. The different features are inclined to occur within any population as a consequence of genetic recombination, mutation and other sources of genetic variation.

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Answer to Problem 1TQ

The two different organisms are closely associated evolutionarily, then they will share a recent common ancestor. Therefore, option (b) is correct.

Explanation of Solution

Justify the reasons for the correct statement:

In evolutionary biology, the common descent explains how a group of organism shares a common ancestor. The various resemblances between the organisms are mainly due to the information of the organism that are evolved through a common descent from a common ancestor. The two dissimilar organisms which share a more recent common ancestor are most closely associated.

Option (b) is given as, “share a recent common ancestor”.

Hence, the option (b) is correct.

Justify the reasons for the incorrect statements:

Option (a) is given as, “be similar in size”. 

The organism that is closely related evolutionary would not be similar in size. Hence, it is a wrong answer.

Option (c) is given as, “have very different DNA sequence in their genes”.   

If the organisms are closely related to evolutionary, then it does not contain different sequence of DNA in their genes but is shares a common ancestor. Hence, it is a wrong answer.

Option (d) is given as, “be randomly located throughout the world”.   

The two various organisms which are associated evolutionary does not randomly situated all over the world, but it shares a common ancestor. Hence, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

Therefore, if the two dissimilar organisms which shares a common ancestor because it is closely related to the evolution.

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