Subject

Biology

Class

CBSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
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 Multiple Choice QuestionsShort Answer Type

11.

State the use of Biodiversity in modern agriculture. 

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12.

 Write the full form of VNTR. How is VNTR different from “Probe‟?

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13.

Differentiate between benign and malignant tumors.

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14.
The above graph shows Species-Area relationship. Write the equation of the curve “a‟ and explain.


The curve represents Species-Area relationships.

Curve “a” is represented by the equation S = CAz

Where,
S= Species richness
Az= Area Z = slope of the line (regression coefficient)
C = Y-intercept

Characteristic feature-
1. Within a region richness of species increases with exploration of new areas but only upto a limit.

2. Straight line represent in the graph represent logarithmic value of species richness.

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15.

Differentiate between in-situ and ex-situ approaches of conservation / of biodiversity.

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16.

The cell division involved in gamete formation is not of the same type in different organisms. Justify.

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17.

Identify the type of the given ecological pyramid and give one example each of pyramid of number and pyramid of biomass in such cases.
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18.

Describe the Lactational Amenorrhea method of birth control.

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19.

Name the type of bioreactor shown. Write the purpose for which it is used:


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20.

Draw a labelled diagram of the reproductive system in a human female.

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