Organism

In biology and ecology, an organism (in Greek organon = instrument) is an assembly of organs that influence each other in such a way that they function as a more or less stable whole and have properties of life.

Common characteristics

Characteristics common to many organisms include:

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• Movement
• Feeding
• Respiration
• Growth
• Reproduction
• Sensitivity to stimuli

These are not universal, however. Many organisms are incapable of independent movement (although for example the growth of plants can be described as such), and do not respond directly to their environment. Microorganisms such as bacteria may not conduct respiration, using alternate chemical pathways instead. And many organisms are incapable of reproduction, although their species is not.

Related Topics:
Plant - Microorganism - Species

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