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प्रश्न
Why earthworm is called the friend of farmer?
उत्तर
The earthworm is called a friend of farmers because they help farmers by moving through the soil which helps in the aeration of the soil. The excreta which is released by them helps in increasing the fertility of the soil.
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संबंधित प्रश्न
Which of the following is CORRECTLY stated as happens in common cockroach?
Earthworm live in the burrows which are made
Match the following with reference to cockroach and choose the correct option
| Column I | Column II |
| A. Hermaphrodite | i. Produces blood cells and haemoglobin |
| B. Direct development | ii. Testis and ovary in the same animal |
| C. Chemoreceptor | iii. Larval form absent |
| D. Blood gland in earthworm | iv. Sense of chemical substances |
Correct the wrong statement from the following:
Muscular layer in the body wall of earthworm is made up of only circular muscles.
Correct the wrong statement from the following:
Typhlosole is the part of intestine of earthworm.
Why nephridia in earthworm that are basically similar in structure classified into three types? Mention the names of each.
Comment upon the gametic exchange in earthworm during mating.
