Which of the following in the human body is affected by leukemia?

A: Lungs

B: Blood

C: Eyes

D: Nerves

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Blood

The natural source of hydrocarbon is:______?

A: Biomass

B: Crude oil

C: Coal

D: Carbohydrates

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Crude oil

Which of the following protects the body against infectious disease and foreign invaders?

A: Red blood cells

B: Leukocytes

C: Endoplasmic reticulum (ER)

D: Golgi apparatus

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Leukocytes

The major ingredient of leather is________?

A: Polymer

B: Collagen

C: Nucleic acid

D: None of these

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Collagen

The most abundant element in the universe is _____.

A: Hydrogen

B: Oxygen

C: Carbon Dioxide

D: Silicon

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Hydrogen

A seed can germinate in the absence of_____?

A: Light

B: Oxygen

C: Moisture

D: Temperature

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Light

Sound of frequency below 20 Hz is:______?

A: Infrasonic

B: Audiosonic

C: Ultrasonic

D: Supersonic

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Infrasonic

The strongest part(s) of a magnet is/are ____?

A: South pole

B: North pole

C: North and south pole

D: Median of north and south pole

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North and south pole

A body of land that is surrounded by water on three sides is called___?

A: Bay

B: Strait

C: Peninsula

D: Gulf

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Peninsula

For which one of the following is the density maximum?

A: Water

B: Ice

C: Benzene

D: Chloroform

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Water

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