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AIIMS2013BotanyEcosystem

Assertion : Rice field is an ecosystem for plants and animals. Reason : Gut of human/animals is an ecosystem for flora and fauna.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false

Correct answer

B. If both assertion and reason are true but reason is not the correct explanation of assertion.

Step-by-step solution

The human digestive system carries about trillions of microorganisms colonising the gut making an amazing ecosystem that live together in harmony. In this context human intestine is said to be rich in flora and fauna. The microorganisms perform a host of useful functions, such as fermenting unused energy substrates, training the immune system, preventing growth of harmful, pathogenic bacteria, regulating the development of the gut, producing vitamins for the host (such as biotin and vitamin K ), and producing hormo

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