Why are most of the animals we see symmetrical in appearances (e.g. humans have left-right symmetry) but not plants and trees?
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In addition to what others have said about how plants versus animals develop, it’s also worth noting the different physiological needs. Plants do not have to “perceive” or move around their environment, judging distances and coordinating limbs. Therefore it isn’t necessary to have eyes/ears on the same plane or a set distance apart, and to have an equal number of appendages of equal length. A tripedal animal with one leg longer than the other 2 and just a single eye would be evolutionarily disadvantaged as both predator and prey.
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