Excretory structures known as protonephridia are present in A) flatworms. B) ear

Author Question: Excretory structures known as protonephridia are present in A) flatworms. B) ear (Read 678 times)

j_sun

Sr. Member
Posts: 384

on: Sep 17, 2013

Excretory structures known as protonephridia are present in
A) flatworms.
B) earthworms.
C) insects.
D) vertebrates.
E) cnidarians.

sammy

Hero Member
Posts: 818

Reply #1 on: Sep 21, 2013

I remember it was A

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j_sun

Sr. Member
Posts: 384

Reply #2 on: Oct 15, 2013

Thanks dude! Marking this solved.

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