Skip to content
Environment

UPSC PYQ – Food Chain

1. Consider the following kinds of organisms:

  1. Copepods
  2. Cyanobacteria
  3. Diatoms
  4. Foraminifera

Which of the above are primary producers in the food chains of oceans? [UPSC Civil Services Exam – 2021 Prelims]

 
 
 
 

2. Which one of the following is the correct sequence of a food chain? [UPSC Civil Services Exam – 2014 Prelims]

 
 
 
 

3. With reference to the food chains in ecosystems, which of the following kinds of organism is/are known as decomposer organism/organisms?

  1. Virus
  2. Fungi
  3. Bacteria

Select the correct answer using the code given below: [UPSC Civil Services Exam – 2013 Prelims]

 
 
 
 

4. With reference to food chains in ecosystems, consider the following statements:

  1. A food chain illustrates the order in which a chain of organisms feed upon each other
  2. Food chains are found within the populations of a species
  3. A food chain illustrates the numbers of each organism which are eaten by others

Which of the statements given above is/are correct? [UPSC Civil Services Exam – 2013 Prelims]