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
Multiple 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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