Related Clues:

• Subj. of three of the six Nobel Prizes
• Poly-___ (college major)
• Grade sch. class
• See 35-Across
• ___-fi
• Biol., e.g.
• See 21-Across
• Geol., e.g.
• Phys., e.g.
• Kind of fair: Abbr.
• Biol. or chem.
• High school dept.
• 9-Down, e.g.
• Poli follower
• Grade sch. subj.