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

1.

Mention the unique flowering phenomenon exhibited by Strobilanthus kunthiana (neelakuranaji). 

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2.

How does smoking tobacco in human lead to oxygen deficiency in their body? 

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3.

A garden pea plant (A) produced inflated yellow pod, and another plant (B) of the same species produced constricted green pods. Identify the dominant traits. 

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4.

Why is Eichhornia crassipes nicknamed as Terror of Bengal? 

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5.

Write the location and function of the sertoli cells in humans. 

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6.

Name the following:

(a) The semi-dwarf variety of wheat is high-yielding and disease-resistant.

(b) Any one inter-specific hybrid mammal.
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7.

Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?

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8.

Write what do phytophagous insects feed on

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9.

(a) Highlight the role of thymus as a lymphoid organ.

(b) Name the cells that are released from the above-mentioned gland. Mention how they help in immunity.
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10.

Why do clown fish and sea anemone pair up? What is this relationship called? 


Clown fish pairs up with the sea anemone to get protection from the predators. The relationship is called commensalism because only the fish is benefited from the pairing while the sea-anemone is neither benefited nor harmed.

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