Question # 1

There are _______________ chromosomes in onion.

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46

18

16

23

Ulcers occur in the:

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Stomach

Duodenum

Esophagus

All of these

Saliva is alkaline and contains an enzyme:

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Pepsine

Rennin

Ptyalin

Amylase

Cutting down of trees is known as:

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Habitat loss

Deforestation

Extinction

None of these

Platelets life span in about ........... days.

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6-7

7-8

5-6

8-9

The scientific study of animals is called.

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Physics

Chemistry

Biology

Farming

It is at the risk of becoming extinct because few members are left:

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Extinct

Threatened

Valnerable

Endangered

Which of these materials is not a component of the plasma membrane?

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Phosphorous

Glycoproteins

Proteins

DNA

...................... Is the ability of microscope to distinguish as separate and distinct objects that lie in close proximity.

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Magnification

Resolution

Both a and b

None

Metabolism is of ............... types.

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1

2

3

4

Micronutrients of plants are:

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Available in the soil in small amounts

Required by plants in small amounts

Small molecules required by plants

Useful, but not required by the plants

Oesophague is .......... centimeters long.

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10 cm

25 cm

20 cm

None

Necrosis is:

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Division of cells

Suicide of cells

Cell death by tissue damage

Weakness of cells

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