![]() In this state, they can withstand harsh.They share many characteristics with arthropods.Ĭryptobiosis, where metabolism is imperceptible.Tardigrades, or water bears, are less than a.Velvet worms (phylum Onychophora) are nocturnalĬaterpillar-like animals that have changed little.Some of the phyla within the Ecdysozoa are very.The relationship of the blastopore to the mouth. ![]()
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