Question

Excretory casts of Earthworms are rich in
O
A
chlorine
B
phosphorus, nitrogen
С C
oxygen
D
calcium​

Answer 1

Answer:

B is the answer

please mark as brainliest answer

Answer 2

Excretory casts of Earthworms are rich in D calcium.

• Earthworms belong to the kingdom of arthropods.
• Annelida are a group of organisms that have segmented bodies and are coelomic and triploblastic.
• They have nephridia for excretion and setae for locomotion.
• The earthworm is the most common example of Annelida.
• Earthworm makes the soil fertile and suitable for farmers' purpose that's why they are known as farmers' friend.
• Earthworm casting contains nitrates, phosphorous, potassium and calcium and is used as fertiliser.
• Earthworm casting is a waste product for earthworms.