Q. What is the structural and functional unit of life ?

Correct Answer: a) Cell

Explanation: The cell is considered the structural and functional unit of life because it is the smallest unit that can perform all the basic functions necessary for life. All living organisms are made up of cells, and they carry out essential processes such as metabolism, growth, reproduction, and response to stimuli. While organs, tissues, and organisms are larger structures, they are all composed of cells working together. Hence, the cell is the fundamental building block of life.