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Origin. 20 out of the 36 body plans originated in the Cambrian period, in the "Cambrian explosion", However, complete body plans of many phyla emerged much later, in the Palaeozoic or beyond.
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that looks complicated
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please do not answer other's question if you don't know the answer
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Plants grow towards the light in order to explain the term phototropism
Plants grows in the direction of light in order to validate the essence of light in photosynthesis
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