The respiratory surface of human is ______...? Mcqs

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The respiratory surface of human is ______...?

(A) Nostril
(B) Bronchiole

(C) Alveoli
(D) Trachea

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If the length of a heater coil is reduced by 10% of its original length, then Power consumed by heater will...?

(A) Increase over 10%
(B) Decrease by 10%

(C) Decrease by 0.5%
(D) Increase by 0.5%

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Stimulus is detected by ______...?

(A) Receptor
(B) Effector

(C) Nerve
(D) All of these

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Bacteria that are used in producing transgenic plants, such as golden rice, is:...?

(A) E. coli
(B) Mycobacterium

(C) Xanthomonas
(D) Agrobacterium tumefaciens

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The gas heater gives us heat by __________...?

(A) Radiation
(B) Conduction

(C) Convection
(D) Environmental pressure

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Which mineral is essential for building bones and teeth, muscle functioning and blood clotting...?

(A) Calcium
(B) Magnesium

(C) Iron
(D) Sodium

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Which of the following vitamins is synthesized in the body by intestinal bacteria_______...?

(A) Vitamins B1
(B) Vitamins B12

(C) Vitamins E
(D) Vitamins K

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Which of the following is/are the characteristics of reptiles...?

(A) Dry scaly skin
(B) Cold-blooded

(C) Lay eggs on land
(D) Lives in/on water/land

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Moon is a__________...?

(A) Star
(B) Planet

(C) A & B
(D) Satellite

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Which of the following equations represents a decomposition reaction...?

(A) A+B → AB
(B) A → AB

(C) AB → AC
(D) AB → A+B

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