Tooth decay is caused by?

A: Sugar

B: Salt

C: Calcium

D: Formalin

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Sugar

What do you understand by disease “Insomnia”?

A: Depression

B: Color blindness

C: Hypertension

D: Inability to sleep

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Inability to sleep

The Reason for a Swimming Pool to appear Less Deep than the actual depth is_____?

A: Light scattering

B: Refraction

C: Reflection

D: Interference

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Refraction

The lenses are used for the correction of:_______?

A: short sightedness

B: Long-sightedness

C: Both A & B

D: None of those

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Both A & B

Which of the following explains the reason why there is no total eclipse of the sun?

A: Orbit of moon around earth

B: Size of the earth in relation to that of moon

C: Direction of rotation of earth around sun

D: Area of the sun covered by the moon

E: None of these

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Area of the sun covered by the moon

The blue colour of clear sky is due to_____?

A: Refraction of light

B: Reflection of light

C: Diffraction of light

D: Dispersion of light

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Dispersion of light

The study Of GLANDS is called?

A: None of these

B: cardiology

C: Endocrinology

D: Entomology

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Endocrinology

Which of the following is the study of micro- organisms, mostly viruses and single called organisms such as bacteria, yeasts and protozoa ?

A: Micrology

B: Microbiology

C: Histopathology

D: Tavelogy

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Microbiology

At night, Plants intake _____ and release _____?

A: Carbon dioxide - Oxygen

B: Oxygen - Carbon dioxide

C: Oxygen - Carbon monoxide

D: None of these

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Oxygen - Carbon dioxide

Which one of the following is not a unit of distance?

A: Astronomical Unit

B: Parsec

C: Light Year

D: Foot Candle

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Foot Candle

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