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.

Which waste product is generally excreted by diffusion across body surface in ionic form?

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.

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.

Assertion : Ammonia should be eliminated from the body as rapidly as it is formed . Reason : Ammonia is insoluble in water .

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 :- Imbibition is dependent on diffusion and water potential gradient. Reason:- Diffusion and water potential gradient create ability of surface adhesion