Which of the following is the main characteristic of electromagnets that makes them useful in cranes and doorbells...? Mcqs

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Which of the following is the main characteristic of electromagnets that makes them useful in cranes and doorbells...?

(A) They are very strong
(B) They are permanent

(C) They can be switched on and off
(D) They are very heavy

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Maintenance of soil fertility without addition of nutrition is due to...?

(A) Microbial Activity
(B) Crops residue

(C) Floods
(D) None of these

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Which of the following has the highest surface tension...?

(A) Glycerol in water
(B) Detergent in water

(C) Soap in water
(D) Water

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Which of the following is solid...?

(A) Water
(B) Stone

(C) Both
(D) None

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Outer layer of the human skin is called __________...?

(A) Hypodermis
(B) Dermis

(C) Hemidermis
(D) Epidermis

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A man can survive without food for atleast...?

(A) 1 month
(B) 2 month

(C) 3 month
(D) 4 month

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The pancreas secrets___________...?

(A) Insulin
(B) Vitamin A

(C) Bile juice
(D) none of these

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Second highest layer of Earth's atmosphere is _______...?

(A) Troposphere
(B) Stratosphere

(C) Mesosphere
(D) Thermosphere

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A type of cell division in which spore mother cell produce spores...?

(A) Amitosis
(B) Mitosis

(C) Meiosis
(D) Both A and B

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Which of the following terms is used for species evolving from the same ancestor to different ecological niches...?

(A) Convergent evolution
(B) Divergent evolution

(C) Adaptive radiation
(D) Coevolution

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