Question

Arrange the following on the basis of evolution of excretory structure.
Nephridia, Protonephridia, Kidneys, Malphigian tubules, Green glands.

• A. Protonephridia, Nephridia, Kidneys, Malphigian tubules, Green glands
• B. Nephridia, Protoephridia,Green glands, Kidneys, Malphigian tubules
• C. Protonephridia, Nephridia, Malphigian tubules, Green glands, Kidneys.
• D. Nephridia, Protonephridia, Malphigian tubules, Green glands, Kidneys.

Answer 1

The correct option is C Protonephridia, Nephridia, Malphigian tubules, Green glands, Kidneys.

The correct arrangement of excretory structures according to evolution is: protonephridia, nephridia, Malpighian tubules, green glands, and kidneys.
Protonephridia are also called flame cells and occur in Platyhelminthes, Rotifera, and some Annelids. They help in osmoregulation.
The nephridium is also an invertebrate organ and removes nirogenous wastes from an animal's body. Nephridia are mainly found in annelids and help in maintaining the balance of ions and fluids
Malpighian tubules are the excretory structures found in most of the insects such as cockroaches.
Green glands are also known as antennal glands which are mainly found in crustaceans like prawns and eliminate nitrogenous wastes from their body.
Kidneys are found in vertebrates. They are complex excretory structures. They filter blood and help in elimination of nitrogenous wastes.