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MCQs

Total Questions : 216 | Page 5 of 22 pages
Question 41. Since 1800 the amount of carbon dioxide in the atmosphere has increased
  1.    0.2
  2.    0.25
  3.    0.5
  4.    0.3
 Discuss Question
Answer: Option D. -> 0.3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 42. The group of consumers in an ecosystem includes
  1.    viruses
  2.    bacteria
  3.    plants
  4.    animals
 Discuss Question
Answer: Option D. -> animals
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 43. The substances that cause pollution are
  1.    chemicals
  2.    pollutants
  3.    gases
  4.    bad substances
 Discuss Question
Answer: Option B. -> pollutants
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 44. The tertiary consumers that are fed on primary carnivores are also known as
  1.    primary carnivores
  2.    tertiary carnivores
  3.    secondary carnivores
  4.    secondary herbivores
 Discuss Question
Answer: Option C. -> secondary carnivores
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 45. Pitcher plant, Sundew are common examples of
  1.    omnivores
  2.    carnivores
  3.    herbivores
  4.    scavengers
 Discuss Question
Answer: Option B. -> carnivores
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 46. The fish aquarium is best classified as an example of
  1.    natural biosphere
  2.    artificial biosphere
  3.    artificial ecosystem
  4.    natural ecosystem
 Discuss Question
Answer: Option C. -> artificial ecosystem
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 47. The carbon atom is the principal building block of many kinds of
  1.    bio nutrients
  2.    bio cells
  3.    bio cycles
  4.    biomolecules
 Discuss Question
Answer: Option D. -> biomolecules
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 48. Predation helps to maintain balance in
  1.    community
  2.    population
  3.    ecology
  4.    ecosystem
 Discuss Question
Answer: Option C. -> ecology
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 49. The level at which an organism feeds in a food chain is called
  1.    trophic level
  2.    food level
  3.    food chain level
  4.    ecology niche
 Discuss Question
Answer: Option A. -> trophic level
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 50. The process of conversion of oxides of nitrogen into nitric acid and then into nitrates is classified as
  1.    atmospheric oxygen fixation
  2.    atmospheric nitrogen fixation
  3.    biological nitrogen fixation
  4.    biological oxygen fixation
 Discuss Question
Answer: Option B. -> atmospheric nitrogen fixation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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