Root hairs are most important to a plant because they ______...? Mcqs

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Root hairs are most important to a plant because they ______...?

(A) Store starch
(B) Contain xylem tissues

(C) Provide a habitat for nitrogen fixing bacteria
(D) Increase the surface area for absorption

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Second name of ethyl alcohol is___________...?

(A) Ethene
(B) Ethanol

(C) Propyle
(D) none

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The natural world that surrounds a living and non-living things is called...?

(A) Ecosystem
(B) Environment

(C) Habitat
(D) Biodiversity

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The gases which are used by drivers as an artificial atmosphere are helium and_____________...?

(A) Nitrogen
(B) Oxygen

(C) Neon
(D) Carbon monoxide

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When we sleeps blood pressure_____________...?

(A) Increases
(B) Decreases

(C) Remain constant
(D) None of these

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All forms of energy that we use are ultimately transformed into__________...?

(A) Electrical Energy
(B) Heat Energy

(C) Light Energy
(D) Chemical Energy

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The part of ear that is visible is called _______...?

(A) External Ear
(B) Pinna

(C) Internal ear
(D) both A & B

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Water is a highly effective coolant for a car engine because _________...?

(A) Water is good conductor of heat
(B) Water has very high specific heat capacity

(C) Water boils at a comparatively high temperature
(D) Evaporation of water produces lot of cooling

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Pollen grains are microscopic structure located in _____ of flower....?

(A) Stamen
(B) Anther

(C) Pistil
(D) Petal

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How many hearts an Octopus has...?

(A) 10
(B) 8

(C) 5
(D) 3

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