Which of the Following is the Smallest Unit of All

Question

Which of the following is the smallest unit of all living things?
A) organ
B) tissue
C) cell
D) organ system

Accepted Answer

Cells are the smallest unit of all living things. They are the basic building blocks of life and carry out all the necessary functions to keep organisms alive. Organs are made up of tissues, which in turn are made up of cells, and organ systems are made up of various organs working together.