Opening and closing of stomata is also regulated by ___...? Mcqs

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Opening and closing of stomata is also regulated by ___...?

(A) Epidermal cells
(B) Guard cells

(C) Root hair cells
(D) Mesophyll cells

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Cell membrane is composed of _____ layer....?

(A) Single
(B) Double

(C) Triple
(D) None

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A man pulls a crate of mass 25 kg across the leveled ground with a horizontal force of 60 N. A constant force of friction of 20 N acts on the sledge. What is the acceleration of the sledge...?

(A) 0.63 ms^-2
(B) 1.6 ms^-2

(C) 2.4 ms^-2
(D) 3.2 ms^-2

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1 Coulomb = ___________ e....?

(A) 6×10-19
(B) 6.25×1018

(C) 1.6×1019
(D) 6.25×10-18

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In bacteria mesosomes take the place of which one of the following...?

(A) Ribosome
(B) Mitochondria

(C) Golgi bodies
(D) None of these

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The spray bottles used as window or household cleaner or perfume spray works on: __________...?

(A) Capillary action
(B) Bernoulli’s Principle

(C) Pascal’s Law
(D) Stoke’s Law

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Evaporation from ice and snow is known as___________...?

(A) evaporation
(B) sublimation

(C) hydrogenation
(D) insolation

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Which of the following is a five-carbon compound in the Kreb's cycle...?

(A) Fumaric acid
(B) Citric acid

(C) Malic acid
(D) Alpha-ketoglutarate

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What happens to a person who receives the wrong type of blood...?

(A) All the arteries constrict
(B) All the arteries dialates

(C) The RBCs agglutinate
(D) The spleen and lymphnodes deteriorate

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Which of the following is not a primary colour ________....?

(A) Red
(B) Blue

(C) Green
(D) Yellow

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