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Chapter 1, Problem 1MCQ

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Biology: Concepts and Investigatio...

3rd Edition
Mariëlle Hoefnagels Dr.
ISBN: 9780073525549

Solutions

Chapter
Section
BuyFindarrow_forward

Biology: Concepts and Investigatio...

3rd Edition
Mariëlle Hoefnagels Dr.
ISBN: 9780073525549
Summary Introduction

Introduction:

Biology is the study of life and life is the “existence of an organism”. It can also be defined as the condition that differentiates plants and animals from inorganic matter on the basis of reproduction, growth, functional activities and continual change.

Answer

Correct answer:

The basic unit of life is a cell. Therefore, option d. is correct.

Explanation

Reason for the correct statement:

Option d. is given as “Cell”. The basic unit of life is a cell. It forms the basis for function, biological and structural unit of all living organisms. Cell biology is a branch of biology that deals with the study of the cells. Life is only possible when all the biomolecules and chemistry are brought together and organized into a cell. Hence, the cell is the basic unit of life.

Hence, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “Atom”. All the living structures on the smaller scale are composed of atoms but they are not the basic unit of life. Hence, option a. is incorrect.

Option b. is given as “Molecules”. Two or more atoms held together to form molecules with the help of chemical bonds. Thus, they are not basic unit of life. Hence, option b. is incorrect.

Option c. is given as “Organelle”. The molecules group together and form organelles. Organelles are the compartments that carry out a specific function in the cell. Thus, they are not basic unit of life. Hence, option c. is incorrect

Hence, options a., b., and c. are incorrect.

Conclusion

Cell form the basis for function, a biological and structural unit of all living organisms.

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