biology vs biological

biology is a noun but biological is not a noun.

Word	Noun	Adjective	Verb	Adverb
biology	Yes	No	No	No
biological	No	Yes	No	No

biology (noun)	biological (noun)
the science that studies living organisms
all the plant and animal life of a particular region
characteristic life processes and phenomena of living organisms

biology (adjective)	biological (adjective)
	(of a parent or child) related by blood; genetically related
	pertaining to biology or to life and living things