AP BIOLOGY

Detailed explanation-1: -A cell can be defined as the smallest unit of life. It is the structural, functional and biological unit of all living beings. A cell can replicate itself independently and are thus referred to as the building blocks of life. Each cell contains a cytoplasm which is enclosed by a membrane.

Detailed explanation-2: -Cells are the smallest common denominator of life. Some cells are organisms unto themselves; others are part of multicellular organisms. All cells are made from the same major classes of organic molecules: nucleic acids, proteins, carbohydrates, and lipids.

Detailed explanation-3: -The cell is the smallest unit of life because it is the most fundamental building block of every living organism.

Detailed explanation-4: -The cell is the smallest structural and functional unit of living organisms, which can exist on its own. Therefore, it is sometimes called the building block of life. Some organisms, such as bacteria or yeast, are unicellular-consisting only of a single cell-while others, for instance, mammalians, are multicellular.