Barcode reader is a device ____...? Mcqs

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Barcode reader is a device ____...?

(A) Input
(B) Output

(C) Display
(D) Storage

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Feeding sequences and relationships are called...?

(A) Food webs
(B) Ecosystem

(C) Food chains
(D) Habitats

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A thick layer of air that surrounds the earth is known as...?

(A) Ozone
(B) Atmosphere

(C) Stratosphere
(D) Hydrosphere

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Which is not a cause of land pollution...?

(A) Plastic bags, bottles, glass bottles, tin cans
(B) Vegetables and fruit cutting

(C) Animal wastes
(D) All of these are causes of land pollution

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Which of the following blood pressure readings indicates hypotension (low blood pressure)...?

(A) 140/90 mmHg
(B) 120/80 mmHg

(C) 90/60 mmHg
(D) 60/90 mmHg

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A _______ with a rod, called an axle, through its center lifts or moves loads....?

(A) Wheel
(B) Pulley

(C) Lever
(D) Inclined Plane

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Which of the following objects that do not allow light to travel through them are called...?

(A) Transparent
(B) Translucent

(C) Opaque
(D) None

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Which are the largest of the white blood cells...?

(A) lymphocytes
(B) eosinophils

(C) basophils
(D) monocytes

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Mercury, Venus, Earth and Mars are called___________...?

(A) Dwarf Planet
(B) Gaseous Planets

(C) Terrestrial Planets
(D) Both A & B

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What causes mumps...?

(A) Fungus
(B) Bacterium

(C) Deficiency of vitamins
(D) Virus

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