Related Clues:

• Subj. of three of the six Nobel Prizes
• Poly-___ (college major)
• Technician: Abbr.
• Grade sch. class
• See 35-Across
• ___-fi
• Biol., e.g.
• See 21-Across
• M.I.T. grad: Abbr.
• Geol., e.g.
• Phys., e.g.
• Kind of fair: Abbr.
• Biol. or chem.
• Tech sch. grad
• High school dept.