Question

protonephridia are the main excretory structures in a.cnidarians b.aschelminthes c.molluscs
d.platyhelminthes

I WILL DEFINITELY GIVE AS BRAINLIEST ​

Answer 1

Answer:

D. Platyhelminthes

Explanation:

Protonephridia are generally found in basal organisms such as flatworms. Protonephridia likely first arose as a way to cope with a hypotonic environment by removing excess water from the organism (osmoregulation). These are excretory systems in phyla Platyhelminthes and are also called blind tubules.