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Doctors Medicines MCQs Q&A

  1. A and B
  2. A, B and C
  3. A, C and D
  4. A, B and D
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1 Answers

Option 4 : A, B and D

​Explanation:

Earthworm:

  • The earthworm is a reddish-brown terrestrial invertebrate.
  • They inhabit the upper layer of the moist soil.
  • During day time, they live in burrows made by boring and swallowing the soil.
  • Earthworms play a vital role in the natural cycle of the earth.
  • The Earthworms soften the soil by digging underneath to make tunnels.
  • They play a crucial role in breaking down organic matter and fertilising the soil, simply through their constant eating and pooping.
  • Earthworms can be used for fishing and compost.
  • Worms are important to the ecosystems in which they live and breed.
  • They are known as farmers' friends as their compost helps in enriching the soil and gives bountiful produce.
  • Kingdom: Animalia
  • Phylum: Annelida
  • Class: Clitellata
  • Family: Lumbricidia

 

Earthworms are useful in several ways for farmers:

  • Earthworms make the soil porous by digging burrows in the soil. Hence they are called friends of the farmers.
  • The nitrogenous wastes and other waste products of the earthworms form food for plants. This process of increasing the fertility of the soil by earthworms is called vermicomposting.
  • Earthworms are used as fish bait to catch fish.
  • Some tribals in India use earthworms as medicine to cure jaundice, piles, diarrhoea, bladder stones, etc.
  • The earthworms reduce both acidity and alkalinity of the soil and create optimum conditions for plant growth.
  • The density of earthworms in the soil is considered to be a good indicator of healthy soil because they increase the soil's water-holding capacity and moisture content.

Thus,

A) Earthworms soften the soil of the field in which they live by digging the soil underneath. - Correct

B) The tunnels dug by earthworms provide easy passage for air and water into the soil. - Correct

C) The earthworms eat the weeds and save the main crop. - Incorrect

D) The earthworms eat the dead leaves and plants. The dropping of the earthworms makes the soil more fertile - Correct.

Hence statements A, B and D are correct.

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