EVERYDAY SCIENCE

Detailed explanation-1: -All living organisms are composed of structural and functional units called cells. The body of a living organism may be composed of a single cell or many cells. A cellis the smallest unit of life that can replicate independently.

Detailed explanation-2: -All living organisms are composed of cells, from just one (unicellular) to many trillions (multicellular). Cell biology is the study of cells, their physiology, structure, and life cycle.

Detailed explanation-3: -Cells are the basic structures of all living organisms. Cells provide structure for the body, take in nutrients from food and carry out important functions. Cells group together to form tissues?, which in turn group together to form organs?, such as the heart and brain.

Detailed explanation-4: -No, all organisms that are truly considered living are made up of cells, meaning that there are no living organisms that are not built by cells.

Detailed explanation-5: -All cells are made from the same major classes of organic molecules: nucleic acids, proteins, carbohydrates, and lipids.