BIOLOGY-TEXT
BIOLOGY-TEXT
5th Edition
ISBN: 9781260169621
Author: BROOKER
Publisher: MCG
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Chapter 30, Problem 1TY
Summary Introduction

Introduction: In an ecosystem, large number of microbes like bacteria, virus, and fungi are present. Such microbes can be beneficial or harmful. Microbes are not only limited to the human body, but they are also present throughout the biosphere.

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Answer to Problem 1TY

Correct answer: In a defined environment, many specific species of microbes are assembled. Such specific assemblage of microbes in an environment is referred to as a microbiome. Hence, the correct answer is option c.

Explanation of Solution

Reason for correct answer:

A microbiome refers to many species of microbes with their genes assembled in an environment. For example, in the human body, there are so many species of microbes playing important roles in the human health. The microbiota inside the human body is known as the human microbiome. Similar to the human microbiome, plants and animal microbiomes are also beneficial to them.

Option c. is given as “a particular assemblage of microbes (including their genes) that occurs in a defined environment”.

A microbiome is formed when many microorganisms are assembled in an environment. Within an organism, they may provide health benefits. Hence, the correct answer is option c.

Reasons for incorrect answers:

Option a. is given as, “an interaction between two different species of microorganisms”.

A microbiome does not refer to the interaction between the two species of a microorganism. It is formed when many microorganisms are assembled in an environment. Hence, option a. is incorrect.

Option b. is given as, “an environment that is microscopic”.

Microbiomes can be microscopic, but not every microscopic environment is a microbiome. Hence, option b. is incorrect.

Option d. is given as, “the entire genetic makeup of a particular microorganism”.

The entire genetic makeup of a particular microorganism can be considered as the genome. Microbiomes include several microorganisms in a defined environment along with their genetic material. Hence, option d. is incorrect.

Option e. is given as, “both a and d”.

A microbiome does not refer to the interaction between the two species of a microorganism. Microbiomes include several microorganisms in a defined environment along with their genetic material. Hence, option e. is incorrect.

Hence, the options a., b., d., and e. are incorrect.

Conclusion

Thus, a microbiome is a particular assemblage of microbes (including their genes) in a defined environment.

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