Excretory organs of urochordates are
The urochordates or tunicates are a remarkable group of organisms and typically very beautiful and photogenic. All are marine. They comprise three classes, the ascidians or sea squirts, the larvaceans and the thaliaceans. The body is enclosed in a more-or-less translucent tunic. No special excretory organs appear to be present. Nitrogenous waste is excreted as ammonia, which can easily be carried away in the exhalant flow of water and by diffusion from the general body surface.
So, the correct answer is option A.
Which of the following statements are true for the phylum-Chordata? a) In Urochordata notochord extends from head to tail and it is present throughout their life. b) In Vertebrata notochord is present during the embryonic period only. c) Central nervous system is dorsal and hollow. d) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata.
In which among the following animals, retrogressive metamorphosis is found?
Statement 1: Cephalochordata bears notochord throughout their life. Statement 2: In cephalochordates, notochord extends from head to tail.
Retrogressive metamorphosis is found in
Why the Amphioxus is considered as degenerated chordata?
Excretory organ of Herdmania is
The larval form of urochordates is called as
Sapla and Doliolum belongs to
Which of the following animal belongs to Urochordata?
Urochordata, Hemichordata and Cephalochordata are collectively known as