Animal
Animals are a major group of multicellular, eukaryotic organisms of the kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life. Most animals are motile, meaning they can move spontaneously and independently. All animals are also heterotrophs, meaning they must ingest other organisms or their products for sustenance.
Read more about Animal.
Famous quotes containing the word animal:
“In the animal kingdom, the rule is, eat or be eaten; in the human kingdom, define or be defined.”
—Thomas Szasz (b. 1920)
“To a teacher of languages there comes a time when the world is but a place of many words and man appears a mere talking animal not much more wonderful than a parrot.”
—Joseph Conrad (1857–1924)
“The animal merely makes a bed, which he warms with his body, in a sheltered place; but man, having discovered fire, boxes up some air in a spacious apartment, and warms that.... Thus he goes a step or two beyond instinct, and saves a little time for the fine arts.”
—Henry David Thoreau (1817–1862)