List of top Biology Questions asked in Maharashtra Board Class XII Exam

Define the terms:
a. Gross Primary Productivity
b. Net Primary Productivity
Give reason – ABA is also known as antitranspirant.
Explain the role of chlorophyllase enzyme in banana.
Which of the following is a hormone releasing contraceptive?
Which disease is caused by HPV?
Calcium and Phosphate ions are balanced between blood and other tissues by ______.
Give the name of first transgenic plant.
Which device is used to clean both dust and gases from polluted air?
Mention the name of sterile animal produced by intergeneric hybridisation.
Identify the INCORRECT statement.
Which of the following group shows ZW-ZZ type of sex determination?
In Hamburger’s phenomenon, _______.
Which of the following is the only gaseous plant growth regulator?
Histones are rich in _______.
How many mitotic divisions take place during the formation of a female gametophyte from a functional megaspore?
The pH of nutrient medium for plant tissue culture is in the range of _______.
Rivet Popper Hypothesis is an analogy to explain the significance of _______.

Complete the chart showing human proteins produced by rDNA technology to treat human diseases and re-write. 

Complete the following chart regarding population interaction and re-write: 

 

Complete the following chart regarding energy flow in an Ecosystem and re-write: 

What is blood pressure?
Give any two functions of cerebellum.

Following are the diagrams of entry of pollen tube into ovule. Identify the type A and B.

What is polymerase chain reaction (PCR)?
Describe any three adaptations in anemophilous flowers.
Give any four significances of fertilization in human.