Which among the following is correct about Saliva of a Healthy Human...? Mcqs

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Which among the following is correct about Saliva of a Healthy Human...?

(A) It is slightly acidic
(B) It is slightly saline

(C) It is slightly alkaline
(D) It is neutral

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A mass of 4 kg is equal to _____...?

(A) 400 g
(B) 4000g

(C) 40 g
(D) 40000 g

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Which of the following use movable pulleys...?

(A) Water wells
(B) Flags

(C) Bicycles
(D) Cranes

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Animal that eat the primary consumers are called...?

(A) Tertiary Consumers
(B) Secondary Consumers

(C) Primary Consumers
(D) None

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Sound of frequency below 20 Hz is:___________...?

(A) Audiosonic
(B) Infrasonic

(C) Ultrasonic
(D) Supersonic

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The audible range of normal human ear is ____...?

(A) 16 Hz to 20kHz
(B) 10 Hz to 31kHz

(C) 67 Hz to 45kHz
(D) 20 Hz to 20kHz

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In human osmoregulation takes place by___________...?

(A) Liver
(B) Kidney

(C) Spleen
(D) Lungs

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_____________ are positively (+) charged particles...?

(A) Neutrons
(B) Electrons

(C) Protons
(D) None of These

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Refraction of sound can occur in:...?

(A) Water
(B) Air

(C) Both A & B
(D) None of these

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The atmosphere near the earth’s surface is “heated from below.” Which of the following does not significantly contribute to this heating _____________________...?

(A) Conduction of heat upward from a hot surface
(B) Convection from a hot surface

(C) Absorption of infrared energy that has been radiated from the surface
(D) Heat energy from the earth’s interior

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