Given a scientific question, generate a correct answer to it.

[EX Q]: What functional units of chromosomes determine specific characteristics by coding for specific proteins?
[EX A]: genes

[EX Q]: Most vascular plants are seed plants, also known as?
[EX A]: spermatophytes

[EX Q]: When did we learn there was a hole in the ozone layer?
[EX A]:
1980s