The maize seed is surrounded by a seed coat and it has an opening called...? Mcqs

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The maize seed is surrounded by a seed coat and it has an opening called...?

(A) Micropyle
(B) Embryo

(C) Endosperm
(D) None

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A moderator is used in nuclear reactor in order to ...?

(A) Accelerate the neutrons
(B) Slow down the speed of the neutrons

(C) Increase the number of elections
(D) Decrease the number of electrons

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___________ begins at 690 to 1,000 km from the surface, and extends to roughly 10,000 km....?

(A) Troposphere
(B) Mesosphere

(C) Exosphere
(D) Stratosphere

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In a railway track, two rails are joined end to end with a gap tin between them because...?

(A) Steel can be saved
(B) Accidents due to contraction in winter can be avoided

(C) Air gaps are necessary for bearing the weight of running train
(D) Accidents due to expansion in summer can be avoided

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Which of the following pairs belong to the category of cold blooded animals...?

(A) Snakes and birds
(B) Bat and rats

(C) Frog and snakes
(D) Birds and monkey

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A region of space where matter has collapsed in on itself is called a...?

(A) White Dwarf
(B) Wormhole

(C) Black Hole
(D) Neutron Star

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Tetanus is a _________ infection....?

(A) Viral
(B) Bacterial

(C) Fungal
(D) Parasitic

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The gas used in a refrigerator to cool water is___________...?

(A) Nitrogen
(B) Carbon dioxide

(C) Methane
(D) Tetrafluoroethane

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Which of the following is made up of Calcium...?

(A) Plasma
(B) Bile

(C) Blood
(D) Teeth

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Conversion of free energy into different forms by living organisms is called...?

(A) Biophysics
(B) Biomechanics

(C) Bioenergetics
(D) Biochemistry

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