List of top Questions asked in Maharashtra Class XII- 2025

Interpret the given diagrams A and B. Enlist the changes occurring during inspiration and expiration.
Describe pyramid of energy with the help of diagram.
Give the name and type of I, IV and VII cranial nerves.
Describe nervous system in planaria with well labelled diagram.
Describe physiological effects and applications of ethylene.
What are chromosomal disorders? Describe Turner's syndrome and Klinefelter's syndrome.
Describe histological structure of Testis with well labelled diagram.
What is lac? Enlist economic importance of Lac.
Explain green house effect with reference to gases responsible for it and their sources.
Explain following terms : (a) Grafting \quad (b) Apomixis \quad (c) Polyembryony \quad (d) Parthenocarpy
Name and describe hormones secreted by ovaries.
Identify A, B, and C from the above diagrams and give their functions.
What are the limitations of root pressure theory?
Explain unique features of acquired immunity.
Explain the steps involved in preliminary treatment of sewage.
Give the different steps involved in formation of m-RNA from hn-RNA.
Explain different steps involved in PCR technique.
Define the following terms : (a) Gene flow (b) Chromosomal aberrations
Describe mutualism.
Identify and define 'A' and 'B' in relation to uptake of water by the root :
Explain factors affecting water absorption.
What are the significances of double fertilization?
Distinguish between human sperm and ovum.
What is differentiation and redifferentiation?
Enlist the uses of gene therapy.