Dead cells of xylem vessels arranged vertically have empty space inside called...? Mcqs

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Dead cells of xylem vessels arranged vertically have empty space inside called...?

(A) Cell wall
(B) Lumen

(C) Cytoplasm
(D) Chlorophyll

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During global warming, the percentage of carbon dioxide has ______...?

(A) Remained unchanged
(B) Reduced in atmosphere

(C) Increased in atmosphere
(D) None of these

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Animals are classified into how many main groups...?

(A) 2
(B) 4

(C) 5
(D) 6

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People living in high altitudes (like mountains) usually have a _________...?

(A) smaller number of Red Blood Cells
(B) larger number of Red Blood Cells

(C) smaller number of White Blood Cells
(D) larger number of White Blood Cells

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Oxygen belongs to group VIA so number of electrons in its valence shell are _____...?

(A) 3
(B) 4

(C) 5
(D) 6

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A clouding that develops in the lens of the eye or in its envelope obstructing the passage of light is known as________...?

(A) Glaucoma
(B) Hemophilia

(C) Cataract
(D) Diphtheria

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Mohs’ Scale” is used to indicate the_________...?

(A) Degree of hardness of minerals
(B) Degree of viscosity of a liquid

(C) Degree of elasticity of a material
(D) Degree of brittleness of a substance

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Light travelling in a straight line ______ when it strikes the surface of another medium....?

(A) Reflects
(B) Refracts

(C) Diffracts
(D) Absorbs

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Which provide instant energy...?

(A) Mineral
(B) Vitamin

(C) Carbohydrates
(D) Protein

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Weigh of a body can be measured using a spring balance, it differs from place to place because of variation in ______...?

(A) Acceleration
(B) Gravitational pull

(C) Velocity
(D) Size of spring balance

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