Question

Within the context of animal phylogeny, compare the presence of true tissues and the type of body symmetry found in each of the nine major animal phyla.

Answer 1

The nine major animal phyla in the context of animal phylogeny are Phylum Porifera, Phylum Cnidaria,Phylum Platyhelminthes, Phylum Echinodermata, Phylum Mollusca,Phylum Nematoda,Phylum Arthropoda, Phylum Annelida and Phylum Chordata

What is animal phylogeny?

The animal phylogeny is defined as the division of the animal kingdom according to groups which are due to the type of tissue and their various body symmetry.

The type of tissue and body symmetry of the various animals of the nine major animal phyla include the following:

• Phylum Porifera: They have unsymmetrical or radially symmetrical body type.

• Phylum Cnidaria: They have radially or biradially symmetric type of body.

• Phylum Platyhelminthes: They have bilaterally symmetrical body type with a defined head and tail region.

• Phylum Echinodermata: They have radial symmetry body type with a spacious coelom.

• Phylum Mollusca: They have soft bodies which typically have a "head" and a "foot" region.

• Phylum Nematoda: They have bilaterally symmetrical body type with a defined head and tail region.

• Phylum Arthropoda: They have bilaterally symmetrical body type.

• Phylum Annelida:They are bilateral symmetry worms that have a definite anterior (head) end and a posterior (tail) end.

• Phylum Chordata: They have bilateral symmetry body type with a spacious coelom.

Learn more about phylum here:

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