Biology Key Terms

Flashcards for key biology terms and definitions.

Binomial system

An internationally agreed system in which the scientific name of an organism is made up of two parts, showing the genus and the species

Excretion

Removal of waste products of metabolism and substances in excess of requirements

Growth

A permanent increase in size and dry mass

Movement

An action by an organism or part of an organism causing a change of position or place

Nutrition

The taking in of materials for energy, growth and development

Reproduction

The processes that make more of the same kind of organism

Respiration

The chemical reactions in cells that break down nutrient molecules and release energy for metabolism

Sensitivity

The ability to detect and respond to changes in the internal or external environment

Species

A group of organisms that can reproduce to produce fertile offspring