Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions.
Reason `:-` Some amount of urea may be retained in the kidney matrix of some animals to maintain a desired osmolarity.

Which of following in small amount is retained in kidney matrix of some animals to maintain a desired osmolarity?

Read the following statements and find out the incorrect statements. (a) Kidney plays very significant role in the removal of NH_(3) (b) Terrestial adaptation necessitated the production of more toxic nitrogenous wastes like urea and uric acid for conservation of water . (c) Some amount of urea may be retained in the kidney matrix of some of the ureotelic animals to maintain a desired osmolarity. (d) Uricotelic animals excrete nitrogenous wastes as uric acid in the form of pellet or paste with a minimum loss of water .

Assertion: Ammonia is generaiiy excreted by diffusion across body surfaces or through gin surfaces (in fish) as ammonium ions. Reason: Ammonia is readily soiubie in water.

In some animals desired osmolarity is maintained in the kidney matrix by retaining

In some animals desired osmolarity is maintained in the kidney matrix by retaining

Assertion: The first step of gas exchange occurs through body surface in some animals. Reason: Body surface or membrane of amphibia is thick in nature.

Assertion: The first step of gas exchange occurs through body surface in some animals. Reason: Body surface or membrane of amphibia is thick in nature.

Assertion : Urea is excreted out through the kidneys Reason : Urea is a toxic substance.