List of top Biology Questions

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