What phylum is the most successful and widely distributed in terms of parasites?
a. Nematoda
b. Annelida
c. Polychaeta
d. Mollusca
ANS: A
All major phyla have representations of parasites in the ocean. Nearly all parasites have a speciesspecific
relationship. This is an exclusive relationship to one parasite and one host. Information can be
found in the section Organisms in Communities Can Live in Symbiosis.
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Indicate whether the statement is true or false
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