Multiple Choice
To be considered a cell, it must evolve, have metabolism, replicate its DNA, and never interact with the external environment?
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1. Overview of Cell Biology
Properties of the Cell
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following is the smallest structural and functional unit of an organism?
A
Tissue
B
Cell
C
Organ
D
Organ system
Verified step by step guidance1
Understand the hierarchy of biological organization: Organisms are made up of smaller units organized in a hierarchy. The levels include cells, tissues, organs, and organ systems.
Define each term: A 'cell' is the smallest structural and functional unit of life. A 'tissue' is a group of similar cells working together to perform a specific function. An 'organ' is made up of multiple tissues working together. An 'organ system' is a group of organs that work together to perform complex functions.
Identify the smallest unit: Among the options, the 'cell' is the smallest unit that can independently perform all the functions necessary for life, such as metabolism, growth, and reproduction.
Compare the options: Tissues, organs, and organ systems are all composed of cells, making the cell the fundamental building block of these higher levels of organization.
Conclude: Based on the definitions and hierarchy, the correct answer is 'cell' as it is the smallest structural and functional unit of an organism.
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