Class-12 Biology Practicals Writer -- 2

I need complete Biology practical write-ups for Class 12, delivered in clear, correct Hindi. The college has not imposed any special template, so a standard lab-report structure—aim, materials, procedure, observations, result, and precautions—will be perfect.

Please base each answer on the current Class-12 CBSE/ISC syllabus so I can submit them without extra edits. A clean Word or Google Docs file is fine; a compiled PDF at the end would be a bonus.