AP BIOLOGY

Detailed explanation-1: -Cells are the basic units of life capable of doing all the required biochemical processes that a normal cell has to do in order to live. The basic needs for the survival of all living organisms are the same. All living organisms need to respire, digest food for obtaining energy, and get rid of metabolic wastes.

Detailed explanation-2: -Cells are made of molecules, which are much smaller than cells, and molecules are made of atoms, which are even smaller! At the same time, many cells put together make much larger structures.

Detailed explanation-3: -Cells are the basic structural and functional unit of life as they are the smallest unit that can be called living. One complete cell is capable of performing all the physiological activities. Cells combine to form tissues, which are a collection of cells performing a similar function.