Living systems are incredibly diverse in size, shape, environment, and behavior.

Question

Living systems are incredibly diverse in size, shape, environment, and behavior. It is estimated that there are between 10 million and 100 million different species. Despite this wide variety of organisms, it remains difficult to define what it means to say something is alive. Which of the following can be described as the smallest living unit? A.) Organelle B.) DNA C.) Protein D.) Cell Living systems are incredibly diverse in size, shape, environment, and behavior. It is estimated that there are between 10 million and 100 million different species. Despite this wide variety of organisms, it remains difficult to define what it means to say something is alive. Which of the following can be described as the smallest living unit? A.) Organelle B.) DNA C.) Protein D.) Cell A.) Organelle B.) DNA C.) Protein D.) Cell

Explanation / Answer

Answer is D. Cell

Because Organells, DNA and proteins are part of cells but they can not exist on its own. Cell is the smallest structural and functional unit of living organism, which can exist on its own. Cell contains many organelles, DNA and other structures that help in the various functioning of the cells.

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