Which of the following are the layers of the body wall in sponges...? Mcqs

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Which of the following are the layers of the body wall in sponges...?

(A) Pinacoderm and mesoderm
(B) Pinacoderm and choanoderm

(C) Epidermis and choanoderm
(D) Pinacoderm and ectoderm

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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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In which mode heat transfer in solids...?

(A) Convection
(B) Radiation

(C) Conduction
(D) None

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Vaccination can be administered ______...?

(A) After infection
(B) Before infection

(C) During infection
(D) All are Correct

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How many major gases have been used in re​frig​er​a​tors since its invention...?

(A) 2
(B) 3

(C) 4
(D) 5

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Which one of the following is the softest...?

(A) sodium
(B) iron

(C) aluminium
(D) lithium

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The lowest region of the earth’s atmosphere comes between the earth and stratosphere. what is this region’s name...?

(A) Ionosphere
(B) Troposphere

(C) Stratosphere
(D) Mesosphere

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What happens when you run a plastic comb through your dry and non-oily hair and then hold the comb above bits of paper...?

(A) Bits of paper get instantly attracted to the comb
(B) Bits of paper remain unaffected

(C) Bits of paper start to repel the comb
(D) Bits of paper start to stick to your hair

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The gases used in different types of welding would include:__________...?

(A) oxygen and hydrogen
(B) oxygen, hydrogen, acetylene and nitrogen

(C) oxygen, acetylene and argon
(D) oxygen and acetylene

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Each stoma is formed by ______...?

(A) One guard cell
(B) Two guards cells

(C) Three guard cells
(D) Four guard cells

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