Lecture 11_10

Lecture 11_10 - Animals, or Metazoa Metazoa = Multicellular...

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Animals, or Metazoa
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Metazoa = Multicellular animals (AKA, the animals) Definitions: 1. “a living organism characterized by voluntary movement” (Wordnet) 2. “Animals are a major group of multicellular eukaryotic organisms of the kingdom Animalia or Metazoa… Most animals are motile , meaning they can move spontaneously and independently. Animals are also heterotrophs , meaning they must ingest other organisms for sustenance.” (Wikipedia)
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Your book (p 671-672): -multicellular -heterotrophs -motile -Hox genes (replicated genes important in early development)
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Which feature do you think best characterizes Metazoan? a) multicellular b) heterotrophs c) motile d) Hox genes (replicated genes important in early development)
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Are animal traits unique to animals? Multicellularity Eukaryotic Heterotroph Motile Muscle tissue Hox genes
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Are animal traits unique to animals? Multicellularity NO Eukaryotic NO Heterotroph NO Motile NO Muscle tissue YES (but not all animals) Hox genes YES (maybe all animals, maybe bilaterians) Combinations of features define animals
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A character-based definition of animals: Multicellular, eukaryotic heterotrophs that are usually capable of movement.
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Lecture 11_10 - Animals, or Metazoa Metazoa = Multicellular...

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