A fluid-filled body cavity that forms completely within the mesoderm of animals is a
A) coelom.
B) blastula.
C) pseudocoelom.
D) protostome.
E) deuterostomE.
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Q21: Pinworms and hookworms belong to the phylum
A)NematodA.
B)Annelida.
C)Platyhelminthes.
D)Porifera.
E)Cnidaria.
Q22: Corals and jellyfish belong to the phylum
A)PoriferA.
B)Cnidaria.
C)Platyhelminthes.
D)Nematoda.
E)Annelida.
Q24: Which characteristic would place an organism outside
Q24: When examining a picture of a butterfly,you
Q25: Cnidarians are animals found in _ environments.
A)land-dwelling
B)tree-dwelling
C)desert
D)All
Q27: A circulatory system in which the heart
Q28: All cnidarians share the ability to do
Q30: Flukes and tapeworms belong to the phylum
A)
Q31: The most successful phylum with regards to
Q35: Platyhelminthes include which of the following organisms?
A)
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