What is an animal? evolved from colonial, flagelleted protist, starting in the precambrian sea.
Symmetry: There are two basic designs, radio symmetry and bilateral symmetry. Radio symmetry is like a starfish that has a single disk that radiates out into extra appendages. Bilateral symmetry is like a human where if you cut it down the middle it would be exactly the same on both sides.
Animals are multicellular, heterotrophic( does not make its own food), eukaryotes.
They ingest and have unique tissues
They lack cell walls that provide structual supports for plants and fungi.
Diploid stage usually dominates their life cycle.
All animals reproduce sexually and some can also reproduce asexually.
Phylum Chordata: must have gill slits, mucsles, notochord, adn a post anal tail
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