In biology, cell theory is a scientific theory which describes the properties of cells. These cells are the basic unit of structure in all organisms and also the basic unit of reproduction.
The doctype declaration should be the very first thing in an HTML document, before the <html> tag. The doctype declaration is not an HTML tag; it is an instruction to the web browser about what version of the markup language the page is written in. The doctype declaration refers to a Document Type Definition (DTD).
by Ross Shannon. The font tag was brought in early in HTMLâs life to allow designers to change the size, typeface and colour of their text. It proceeded to do more harm than good â for all sorts of reasons â but mainly because it is a hugely inefficient way to format text.