List of top Questions asked in PSEB XII

As per the Caveat Venditor, let the ________ beware.
(buyer/seller)
Principles of management are static in nature.
New Economic Policy was adopted in 2005.
Centralisation involves concentration of power.
Controlling is independent from planning.
Marketing and selling are the different concepts.
At which level of management does the marketing manager function?
State one feature of demonetisation.
Which type of organizational structure has various divisions?
Name the first step in the process of staffing.
What is meant by wealth maximisation?
What is meant by window display?
Specialisation in the organisation is promoted by the principle of ________
(Division of work/units of direction)
Strategies are never _______
(different/static)

Observe the given diagram and answer the following questions. 
(Note: This question refers to the mice experiment with S-strain and R-strain bacteria) 

a) Who performed this experiment? 
b) What was the conclusion after this experiment? 
c) Write the results of the experiment A - D 
 

Observe the given diagram and answer the following questions. 
(Note: This question refers to the standard diagram of Microsporogenesis in flowering plants) 

a) Which type of cell division occurs in the diagram marked A 
b) The two cells formed in B are called ________ 
c) In figure marked C, four cells are formed. What are they? 
d) What happens to the cells marked C? 
e) What is the total process called? 
 

How can the loss of biodiversity be prevented?
Read the passage carefully and answer the following questions:
A constant input of solar energy is the basic requirement for any ecosystem to function and sustain. Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis. It is expressed in terms of weight (g m⁻²) or energy (kcal m⁻²). The rate of biomass production is called productivity. It is expressed in terms of g m⁻² yr⁻¹ or (kcal m⁻²) yr⁻¹ to compare the productivity of different ecosystems. It can be divided into gross primary productivity (GPP) and net primary productivity (NPP). Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis. A considerable amount of GPP is utilised by plants in respiration. Gross primary productivity minus respiration losses (R) is the net primary productivity (NPP).
a. Define gross primary productivity.
b. What is the main requirement of ecosystem functioning?
c. What is the unit of productivity?
d. GPP $-$ Respiration = ________
Write a short note on industrial melanism.
Name the causing agent of Typhoid. Also write down its symptoms and modes of transmission.
With help of diagram, show the steps of recombinant DNA technology.
What is gene therapy? Illustrate using the example of adenosine deaminase deficiency.
Name and explain the type of interaction between clown fish and sea anemone.
Define Oogenesis. Briefly describe the process of Oogenesis with the help of labelled diagram.
Describe the individuals with the following chromosomal abnormalities:
1. Trisomy of chromosome 21.
2. XXY.
3. XO.