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FPSC Everyday Science MCQs Previous Paper of CSS

45.  Which of the following does not vary predictably with the depth of the aquatic environment?
(a)Salinity  (b)Temperature  (c)Penetration by sunlight  (d)None of these
46.  The quantity of available nutrients _________from the lower levels of the energy pyramids to the higher ones.
(a)Increases  (b)Decreases  (c)Remains stable  (d)None of these
47.  Which of the following is not a major subdivision of the biosphere?
(a)Hydrosphere  (b)Lithosphere  (c)Stratosphere
(d)None of these
48.  Vaccination is synonymous with __________immunity.
(a)Natural active  (b)Artificial passive  (c)Artificial active  (d)None of these
49.  When a patient’s immune system becomes reactive to a drug, this is an example of:
(a) Super-infection  (b)Drug resistance  (c)Allergy  (d)None of these
50.  What is the smallest unit of heredity?
(a)Chromosomes  (b)Gene  (c)Nucleotide  (d)None of these
PART-II
NOTE:(i)  Part-II is to be attempted on the separate Answer Book.

(ii)Candidate must write Q. No. in the Answer Book in accordance with Q. No. in the Q. Paper.
(iii)Attempt ONLY FIVE questions from PART-II. ALL questions carry EQUAL marks.
(iv)  Extra attempt of any question or any part of the attempted question will not be considered.
Q.No.2.  (a)“The flood disaster in Pakistan is caused by the follies of humans “. Comment. (05)
(b)State the message of “The Earth Hour Movement”. (05)

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