An action by an organism or part of an organism causing a change of position or place.
Respiration
The chemical reactions in cells that break down nutrient molecules and release energy for metabolism.
Sensitivity
The ability to detect or sense stimuli in the internal or external environment and to make appropriate responses.
Growth
Permanent increase in size and dry mass by an increase in cell number or cell size or both.
Excretion
Removal from organisms of the waste products of metabolism (chemical reaction in cells), toxic materials, and substances in excess of requirements.
Nutrition
Taking in of material for energy, growth, and development; plants require light, carbon dioxide, water, and ions. Animals need organic compounds and ions and usually need water.
