Science

The most basic and functional unit of life is called a cell. These cells make up every organism on earth. First discovered by Robert Hooke  external link when examined some cork  …

Tissues are groups of cells with similar structure, composition and functions. They are an intermediary between basic cells and complete organs. The hierarchy of components of living (multicellular) …

Any substance which occupies space and has mass is called matter. It makes up everything single thing in the universe. It’s the building block of everything in the universe. The nature of matter …