Platyhelminthes is the first phylum to possess a coelom.
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Q2: All chordates are vertebrates.
Q41: Annelids demonstrate the important animal characteristic of
Q42: Asymmetry refers to arrangement of body parts
Q43: Sponges were the earliest animals to evolve
Q44: Mammals are the only group of animals
Q45: A marine animal with tube feet and
Q47: Cnidarians such as jellyfish have muscle and
Q49: Invertebrate animals greatly outnumber vertebrates.
Q50: There are both aquatic and terrestrial species
Q51: Molting is necessary for:
A)all animals.
B)all animals with
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