Hydrobiological is an adjective.
The part of speech of generation is a noun.
If you mean "What part of speech is the word cellular?", it is an adjective.
adjective
a prefix
Biotic is an adjective.
The part of speech for "answer" is a noun.
part of speech
The part of speech for this particular word is a noun.
adverb
what part of speech is work
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech of "came" is a verb.
The part of speech for "unfamiliar" is an adjective.
Adjective
The word speech is a noun.