What features are characteristic of Actinopterygii?
Actinopterygii are fish that have fins.

Actinopterygii are bony fish that have spiny fins.

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the answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

hope i

-lavira: )