adjective
Yes, carrots are biennial plants. They typically produce edible roots in their first year of growth, and if left in the ground, they can produce flowers and seeds in the second year before completing their life cycle.
"Noun".
Cabbage is a biennial plant that is grown as if it was an annual (as are carrots).
It can be either an adjective: A cellular building, a cellular phone; or a new noun, meaning "cellular phone".
"Bi" can function as a prefix in English, typically meaning "two" or "twice." It is not a standalone part of speech but a morpheme that can be added to words to modify their meaning.
It is an adjective.
according to me it is biennial.
Istanbul Biennial was created in 1987.
Singapore Biennial Games was created in 2010.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
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 for "unfamiliar" is an adjective.