Question # 1

Exchange of gases takes place in.

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Lungs

Bronchioles

Aleoli

Blood

Blood vessels that carry blood away from the heart are

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Capillaries

Veins

Arteries

Vanules

A pigment in the skin that protcts harmful effects of sunlight.

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Haemoglobin

Melanin

Lysozyme

Lymphocyte

Which of the following is used to cheek heart beat and blood pressure.

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Thermometer

Galvanometer

Stethoscope

Ammeter

The outermost layer of a root is called.

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Epidermis

Endodermis

Cortex

Xylem

Which of the following is an anion.

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F

Cl

S-2

NH3

The particles of an element having different mass numbers.

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Proton

Neutrons

Isotopes

Atoms

Zince oxide is ............... solid substances.

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Red

White

Yellow

Blue

A solution is named after the name of

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Solvent

Solute

Mixture

None of these

The degreee of hotness or coldness is called.

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Thermal contrction

Heat

Thermal Expansion

Temperature

A concentrated solution can dissolve in it.

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No further amount of solute

Less quantity of solute

Large quantity of solute

Amount of solute equal to amount of solvent

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