List of practice Questions

What are the significances of double fertilization?
Identify and define 'A' and 'B' in relation to uptake of water by the root :
Describe mutualism.
Explain factors affecting water absorption.
What is differentiation and redifferentiation?
Select and rewrite appropriate disorder of respiratory system with the given symptoms : [ sinusitis, emphysema, silicosis and asbestosis, laryngitis ]
Expand the term ZIFT.
Give the name of endocrine gland which is prominent at birth but gets gradually atrophied in adult stage.
What is the full form of IAA?
Give the name of microbial source of antibiotic chloromycetin.
Which cells of islets of Langerhans produce a hormone insulin?
How many meiotic divisions are required for the formation of 300 seeds in angiosperm?
Explain the term Emigration.
What are the reasons for the success of Mendel?
Arrange the following steps of DNA fingerprinting in correct sequence :

Gel electrophoresis
Isolation of DNA
Southern blotting
Restriction digestion
Which of the following is caused by unsterilized needle?
Recognition sequence of restriction enzymes are generally ______________ nucleotides long.
Which of the following types require pollinator but result is genetically similar to autogamy?
Which one of the following does not evolve further?
Identify the appropriate term for the number of births under ideal conditions :
Observe the graph and select correct option :
What are vestigeal organs?
State whether entropy change is positive or negative in the following examples : (i) Melting of ice (ii) Vaporisation of a liquid Explain ‘common ion effect’ with example.
Draw a neat and labelled diagram of a lead accumulator cell. Write the overall reactions taking place at cathode and anode during discharging of the cell.
Define a unit cell. Which colour is shown by NaCl crystal due to formation of F-centre? Why does fluorine show anomalous behaviour in ‘17 group’ elements?