First slide

Classification of Animals

Question

An excretory system is absent in

Moderate

A

Anopheles
B

Antedon
C

Aplysia
D

Ascidia

Solution

An excretory system is absent in echinoderms, e.g., Antedon.
Other animals have an excretory system:
Anopheles (Arthropoda) – Malpighian tubules
Aplysia (Mollusca) – Metanephridia
Ascidia (Urochordata) – Neural gland, nephrocytes

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