Endospores are hardy, defensive structures that enable some bacteria to survive harmful environmental conditions, such as starvation, high temperatures, desiccation (drying out), chemical disinfectants and extremes in pH.
Recursive formula is a formula that is used to determine the next term of a sequence using one or more of the preceding terms.
The Simple English Wiktionary has a definition for: formula. In mathematics or science a formula is a rule or statement written in algebraic symbols. The plural of formula can be written in two ways: formulae or formulas - the choice is based on personal preference. Formulas use letters instead of words. A simple example of a formula is y = x. Here, if x is, for example, 1, then y = x so y = 1. Possibly the most famous formula is e = m Ã c 2. Albert Einstein created this. In it, e is energy, m is mass and c is the speed of light.