Question

Urinary bladder in birds is absent because
A) Disturbs equilibrium of birds
B) Urine is absent
C) Solid excretory product
D) All of them

Answer 1

D is the answer for this question

Answer 2

Urinary bladder in birds is absent because

There is no urinary bladder in class Aves, which includes birds. This is because their waste products are mainly uric acid i.e, urine is absent. They are uricotelic and expel waste with their feces. Also, birds have to fly in the air and a little more weight added reduces their equilibrium and thus reduces their flight ability.

So, All of them (option D) is the correct answer