The correct option is Green glands.
Explanation
Excretion is the process of removing nitrogenous waste products from the body. Different animal phyla and classes have evolved specific excretory organs adapted to their physiological needs and habitats.Detailed Analysis:
- Green glands is Correct: Green glands, also known as antennal glands, are the primary excretory organs in crustaceans such as prawns, crabs, and lobsters. They are located at the base of the antennae and perform excretory and osmoregulatory functions.
- Nephridia is Incorrect: Nephridia are the tubular excretory structures found in Annelids (e.g., earthworms) and some other invertebrates. They help in the removal of nitrogenous wastes and maintain fluid and ionic balance.
- Malpighian is Incorrect: Malpighian tubules are the excretory organs of Insects (e.g., cockroaches) and other terrestrial arthropods like centipedes and millipedes. They absorb solutes, water, and wastes from the surrounding hemolymph.
- Protonephridia is Incorrect: Protonephridia (often associated with flame cells) are the excretory structures found in Platyhelminthes (flatworms), rotifers, and some cephalochordates (e.g., Amphioxus). They are primarily concerned with ionic and fluid volume regulation (osmoregulation).
Key Takeaway:
In the phylum Arthropoda, excretory organs vary by class: Crustaceans use green glands (antennal glands), while Insects utilize Malpighian tubules.