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3 questions · 2013 · answers as per the UPSC key

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UPSC 2013 · Q50 · Science & Technology › Biology · Save

Consider the following minerals:

  1. Calcium
  2. Iron
  3. Sodium

Which of the minerals given above is/are required by human body for the contraction of muscles?

(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
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Answer: (d) 1, 2 and 3
UPSC 2013 · Q86 · Science & Technology › Biology · Save

Fruits stored in a cold chamber exhibit longer storage life because

(a) exposure to sunlight is prevented
(b) concentration of carbon dioxide in the environment is increased
(c) rate of respiration is decreased
(d) there is an increase in humidity
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Answer: (c) rate of respiration is decreased
UPSC 2013 · Q91 · Science & Technology › Biology · Save

Many transplanted seedlings do not grow because

(a) the new soil does not contain favourable minerals
(b) most of the root hairs grip the new soil too hard
(c) most of the root hairs are lost during transplantation
(d) leaves get damaged during transplantation
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Answer: (c) most of the root hairs are lost during transplantation