Excretory structures appeared for the first time in flatworms belong to the phylum:

First life appeared on planet Earth in oceans

The first steam locomotive was appeared in 1814

C) Coelenterata

Correct option is C) Mollusca

Correct option is D) Reptelia

B) Platyhelminthes

(C) Protozoa

(C) Nematoda

(B) iii only

Excretory OrgAnswer:  1. Lungs: Remove CO2 and also water vapour to a considerable extent. Volatile substances present in spices and other food stuff are excreted through lungs  2. Kidneys: Remove nitrogenous waste products...