systematic vs biological science

systematic is not a noun while biological science is a noun.

Word	Noun	Adjective	Verb	Adverb
systematic	No	Yes	No	No
biological science	Yes	No	No	No

systematic (noun)	biological science (noun)
	the science that studies living organisms

systematic (adjective)	biological science (adjective)
characterized by order and planning
of or relating to taxonomy