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MCQs

Total Questions : 216 | Page 6 of 22 pages
Question 51. The carbon dioxide (CO2) taken by the producers from the atmosphere is converted into
  1.    primary compounds
  2.    organic compounds
  3.    inorganic compounds
  4.    terrestrial compounds
 Discuss Question
Answer: Option B. -> organic compounds
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 52. To enable the materials locked up in dead organisms, the main role is played by
  1.    primary consumers
  2.    secondary consumers
  3.    decomposers
  4.    detritivores
 Discuss Question
Answer: Option C. -> decomposers
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 53. The network of food chains that are interconnected with each other at different trophic levels is called
  1.    biogeochemical chain
  2.    food web
  3.    food chain
  4.    biomass chain
 Discuss Question
Answer: Option B. -> food web
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 54. The process of photosynthesis converts solar energy into the
  1.    hydro energy
  2.    chemical energy
  3.    mechanical energy
  4.    tidal energy
 Discuss Question
Answer: Option B. -> chemical energy
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 55. The cyclic pathways through which materials move back from the environment to organisms and organisms to the environment are called
  1.    chemical cycles
  2.    biosphere cycles
  3.    geological cycles
  4.    biogeochemical cycles
 Discuss Question
Answer: Option D. -> biogeochemical cycles
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 56. Reproduction is a basic survival for
  1.    nitrogen
  2.    nitrates
  3.    nitric acid
  4.    nitrites
 Discuss Question
Answer: Option B. -> nitrates
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 57. The reservoir of gaseous nitrogen is classified as
  1.    atmosphere
  2.    biosphere
  3.    abiotic community
  4.    biotic community
 Discuss Question
Answer: Option A. -> atmosphere
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 58. The current level of urbanization in Pakistan is about
  1.    0.3
  2.    0.34
  3.    0.35
  4.    0.32
 Discuss Question
Answer: Option D. -> 0.32
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 59. The interactions between different species members are known as
  1.    intraspecific interactions
  2.    interspecific interactions
  3.    co-dominance interactions
  4.    dominance interactions
 Discuss Question
Answer: Option B. -> interspecific interactions
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 60. When the oxides of nitrogen (NO, NO2) and sulfur (SO, SO2, SO3) interacts with water vapors then the acids produced are
  1.    acetic and citric acid
  2.    sulphuric and nitric acid
  3.    hydrochloric and nitric acid
  4.    sulphuric and citric acid
 Discuss Question
Answer: Option B. -> sulphuric and nitric acid
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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