Subject

Biology

Class

ICSE 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

31. Explain four functions of the liver. 
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32. Write four advantages of cross pollination over self pollination. 
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33. Explain the mechanism of hearing by the human ear.  
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34.

Differentiate between : 

(i) Reparative and Restorative regeneration.

(ii) Capacitation and fertilization.


(c) Differentiation

Reparative

Restorative regeneration

In reparative regeneration, the organism has the power only to repair certain damaged cells of the body. Liver has the extensive power of reparative regeneration.

In restorative regeneration, the organism can redevelop the severed body parts or the whole body can be formed from a body segment. Regenerating of organs and body part such as limbs, tail, external gills.

(ii)

Capacitation

Fertilization

Fertilization of the ovum occurs in the ampulla of the fallopian tube. On reaching the fallopian tube the spermatozoa undergo some changes, which are collectively known as sperm capacitation.

The fusion of the male and the female gametes to form zygote is called fertilization.

 
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35. Name the second and tenth cranial nerves and write one function of each.  
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36.

Give one difference between:

(i) Intraspecific struggle and Interspecific struggle.

(ii) Somatogenic variation and Blastogenic variation.

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 Multiple Choice QuestionsLong Answer Type

37.

(a) Give the anatomical differences between a dicot leaf and a monocot leaf.

(b) Enlist the functions of mineral elements in the life of a plant. What do you mean by essentiality of an element ?

(c) Write the differences between nastic and tropic responses.

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38.

Describe the internal structure of the human heart.

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39. Explain the counter-current system in the nephron. 
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40. Give the differences between cyclic and Non-cyclic photophosphorylation.
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