Question

Mention the animal group in which excretory structures appear for the first time.​

Answer 1

almost all animal group have certain structures which are present in them which are meant for excretion  

Explanation:

• even the most primitive animal Phylum porifera has certain ports in their body which helps in the removal of excess of water and undesirable substances. Different types of excretory products are produced in the body due to the metabolism

• as a result of this excretory product becomes very important for all living organisms.

• the excretory system becomes more developed in case of developed animals.

To know more about excretory system,

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