The primary function of the feathers in birds is to _________...? Mcqs

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The primary function of the feathers in birds is to _________...?

(A) Provide insulation for preserving body heat
(B) Provide striking surface to the wings for flying

(C) Make the body surface waterproof
(D) impart coloration for species as well as sex recognition

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746 watts are equivalent to_____________...?

(A) 1 Joule
(B) 1 erg

(C) 1HP
(D) 1 poise

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Earth is closest to the sun every year in early ______________, when it’s winter for the Northern Hemisphere. We’re farthest away from the sun in early __________________, during our Northern Hemisphere summer....?

(A) January – July
(B) June – December

(C) July – January
(D) December – June

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NH3 can be a base according to ______...?

(A) Arrhenius theory
(B) Bronsted-Lowery theory

(C) Lewis theory
(D) Both b and c

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A powder contains 100mg of a radioactive material that emits α-particles. (See in detail)...?

(A) 0mg
(B) 25mg

(C) 50mg
(D) 75mg

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This in-between phase of stellar nurseries and star formation in stellar evolution is when the gathered dust is still condensing to form a star....?

(A) Alpha Stage
(B) Stellar Genesis

(C) Protostar
(D) Star of Adam

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Vector quantities have _____ along with magnitude and unit....?

(A) Magnitude
(B) Direction

(C) Both a and b
(D) None of them

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Rectified spirit contains alcohol about ...?

(A) 80%
(B) 95%

(C) 70%
(D) 85%

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The audible range of normal bat ear is ______...?

(A) 20 Hz to 120 kHz
(B) 20 Hz to 20 kHz

(C) 20 kHz to 110 kHz
(D) 20 Hz to 50 KHz

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The melting point of ice is_________...?

(A) 00C
(B) 1000C

(C) 40C
(D) -40C

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