Biology (MindTap Course List)
Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 30, Problem 1TYU

Which of the following is not a characteristic of all animals? (a) heterotrophic (b) multicellular (c) eukaryotic (d) presence of a coelom (e) formation of a zygote that undergoes cleavage

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Summary Introduction

Introduction: Animal phylogeny is the rapidly changing field for biologists. Even if the members of the animal kingdom are incredibly diverse, there are various animals sharing certain features that differentiate them from other organisms of the kingdom.

Answer to Problem 1TYU

Correct answer: The presence of a coelom is not a characteristic of all animals. Hence the correct answer is option (d).

Explanation of Solution

Reason for the correct answer:

An internal body cavity that is derived from the mesoderm of the triploblastic animals is known as coelom. Therefore, the presence of coelom is not the characteristics of all animals. All animals are heterotrophic, multicellular eukaryotic organisms. Animals have a basic structure and functional design of body. The structure and functional design of the animal body are adapted to its methods of lifestyle, food intake, and reproduction. Animals experience a period of embryonic development, where the zygote (a haploid sperm unites with a haploid egg to form diploid zygote) undergoes a series of mitotic cell divisions known as cleavage.

Option (d) is given as “presence of a celom”.

The appearance of celom is not the characteristic of all animals. Hence, the correct answer is option (d).

Reasons for incorrect answer:

Option (a) is given as “heterotrophic”.

Animals are heterotrophs, as the consumers depend upon the producers for raw materials and energy. Hence, option (a) is incorrect.

Option (b) is given as “multicellular”.

In case of animals, various cells unite together to form tissue, and the tissues unite together to form organs. Therefore, it is the multicellular organism. Hence, option (b) is incorrect.

Option (c) is given as “eukaryotic”.

Due to the presence of well-defined cell nucleus and membrane-bound organelles in the cell, animals are eukaryotic organisms. Hence, option (c) is incorrect.

Option (e) is given as “formation of a zygote that undergoes cleavage”.

Animals experience a period of embryonic development, where the zygote (a haploid sperm unites with a haploid egg to form diploid zygote) undergoes a series of mitotic cell divisions known as cleavage. Hence, option (e) is incorrect.

Hence, options (a), (b), (c), and (e) are incorrect.

Conclusion

The presence of coelom is not the common characteristic of all animals.

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