Question # 1

Dengue fever is transmitted by

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Culex mosquito

Anopheles mosquito

Aedes mosquito

None of these

Which of the following is a function of human blood?

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It regulates body temperature

It transports wastes

It provides defence

All of the above

Biodiversity is the source of:

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Food

Fibers

Rubber and oil

All of these

There are _______________ chromosomes in onion.

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46

18

16

23

Scientific law is interchangeable with :

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Hypothesis

Theory

Deduction

Observation

One complete cardiac cycle takes ......... second .

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0.2 sec

0.5 sec

0.8 sec

0.9 sec

Pyruvic acid is produced in ______ respiration:

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Aeorbic

Anaerobic

Both aerobic and anaerobic

None of these

There are _______________ major groups of plant tissues.

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1

2

3

4

................ are called accessory pigments.

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Chlorophyll II

Xanthophyll

Carotenoids

All

Characteristics of fungi are .

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Cellular eukaryotes

Lack chlorophyll

Heterotrophic

All of the above

The removal of undigested food from body is called ............. .

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Digestion

Egestion

Inhalation

None

Necrosis is:

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Division of cells

Suicide of cells

Cell death by tissue damage

Weakness of cells

Experimentation is only a step of the scientific process but it is very important step because it always:

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Gives the biologist a correct result

Allows rejection of some alternative hypothesis

Ensures that hypothesis can be confirmed with certainity

Give scientists a chance to work in the laboratory

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