The source of oxygen in photosynthesis is...? Mcqs

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The source of oxygen in photosynthesis is...?

(A) water
(B) salts

(C) minerals
(D) glucose

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Milk tastes sour when kept in the open for sometime due to the formation of __________...?

(A) lactic acid
(B) citric acid

(C) acetic acid
(D) carbonic acid

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Ultrasound has several uses in medicine and industry. Which one has use of ultrasound...?

(A) Absorption
(B) Pre-natal scanning

(C) Dispersion
(D) Measuring humidity of air

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The process of converting wet waste to manure is___________...?

(A) Metabolism
(B) Conservation

(C) Incineration
(D) Composting

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The life cycle of the frog is...?

(A) Frogspawn→tadpoles→frog→froglet
(B) Frogspawn→froglet→frog→tadpoles

(C) Frogspawn→frog→tadpoles→froglet
(D) Frogspawn→tadpoles→froglet→frog

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Transfer of internal energy by collision of particles and movements of electrons within the body is called...?

(A) Conduction
(B) Convection

(C) Radiation
(D) Insulation

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Distance is a _____ quantity....?

(A) Vector
(B) Scalar

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

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The color of a sedimentary rock is often mostly determined by___________...?

(A) Zinc
(B) Iron

(C) Calcium
(D) None of these

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Animals that eat only animals are called...?

(A) Carnivores
(B) Herbivores

(C) Omnivores
(D) None

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How many planets in Solor Syestem...?

(A) 4
(B) 5

(C) 6
(D) 8

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