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Doctors Medicines MCQs Q&A

  1. First
  2. Second
  3. Third
  4. Fourth
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Option 1 : First

The correct answer is First.

Explanation:

Feeding relation in the natural surrounding:

Food chain: 

  • A food chain shows the feeding relationship between different organisms in a particular environment and/or habitat.
  • A food chain shows how energy is passed from the sun to producers, from producers to consumers, and from consumers to decomposes such as fungi.
  • They also show how animals depend on other organisms for food.

Tropic level: 

  • Based on the source of their nutrition or food, organisms occupy a specific place in the food chain that is known as their trophic level.
  • Producers belong to the first trophic level, herbivores (primary consumer) to the second and carnivores (secondary consumer) to the third. The important point to note is that the amount of energy decreases at successive trophic levels.

 Only 10% of energy is transferred to higher levels from the previous one. So, the demand for food is more in higher levels. So, the food chain does not go for more than 3-4 tropic levels. This leads to more complex food forms known as a food web.

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  • Primary (100%) → First level/ Primary (10%) → Second-level/ Secondary (1%) → Third level / Tertiary (0.1%).
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