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Consider the following statements about the earthworms: A. Earthworm make tunnels in the fields which provide easy passage to air and water into the soil. B. Earthworms soften the soil by digging underneath. C. Earthworms save the main crops from weeds. D. The droppings of the earthworms fertilise the soil. The true statements are

Consider the following statements about the earthworms: A. Earthworm make tunnels in the fields which provide easy passage to air and water into the soil. B. Earthworms soften the soil by digging underneath. C. Earthworms save the main crops from weeds. D. The droppings of the earthworms fertilise the soil. The true statements are Correct Answer 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

Important Points 

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.

Related Questions

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Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
Ants have been living on the earth for more than 100 million years and can be found almost anywhere on the planet. It is estimated that there are about 20000 different species of ants. For this reason ants have been called Earth's most successful species. If you watch ants for any length of time you will see that they really do communicate with each other and very effectively too. Ants communicate by touching each other with their antennae. Ants also use chemicals called pheromones to leave scent trails for other ants to follow. Ants build many different types of homes. Many ants build simple little mounds out of dirt or sand. Other ants use small sticks mixed with dirt and sand to make a stronger mound that offers protection from rain. Western Harvester ants make a small mound on top, but then tunnels up to 15 feet straight down to hibernate during winter. Ant mounds consist of many chambers connected by tunnels. Different chambers are used for nurseries, food storage, and resting places for the worker ants. Some ants live in wood like termites. Army ants don't make a home at all but travel in a large groups searching for food. Ants are social insects which means they live in large colonies or groups. Some colonies consist of millions of ants. There are three types of ants in each species, the queen, the sterile female workers and males. The male ants only serve one purpose, to mate with future queen ants and do not live very long. The queen grows to adulthood, mates, and then spends rest of her life laying eggs. A colony may have only one queen, or there may be many queens depending on the species. Ants go through four stages of development: egg, larva, pupa and adult. What does the Western Harvester do in winter ?
Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
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Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
Ants have been living on the earth for more than 100 million years and can be found almost anywhere on the planet. It is estimated that there are about 20000 different species of ants. For this reason ants have been called Earth's most successful species. If you watch ants for any length of time you will see that they really do communicate with each other and very effectively too. Ants communicate by touching each other with their antennae. Ants also use chemicals called pheromones to leave scent trails for other ants to follow. Ants build many different types of homes. Many ants build simple little mounds out of dirt or sand. Other ants use small sticks mixed with dirt and sand to make a stronger mound that offers protection from rain. Western Harvester ants make a small mound on top, but then tunnels up to 15 feet straight down to hibernate during winter. Ant mounds consist of many chambers connected by tunnels. Different chambers are used for nurseries, food storage, and resting places for the worker ants. Some ants live in wood like termites. Army ants don't make a home at all but travel in a large groups searching for food. Ants are social insects which means they live in large colonies or groups. Some colonies consist of millions of ants. There are three types of ants in each species, the queen, the sterile female workers and males. The male ants only serve one purpose, to mate with future queen ants and do not live very long. The queen grows to adulthood, mates, and then spends rest of her life laying eggs. A colony may have only one queen, or there may be many queens depending on the species. Ants go through four stages of development: egg, larva, pupa and adult. What is the purpose of male ants ?