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How much water is required to dissolve 1 gram urea to nontoxic level?
a) 50 ml
b) 500 ml 
c) 1 ml
d) 100 ml

a

Explanation: urea is less toxic than ammonia that’s why it requires less water to become less toxic



Animals which excretes urea as major nitrogenous wastes are called……
a) ammontelic             
b) uricotelic
c) ureotelic                 
d) nitrotelic

c

Explanation: human is ureotelic excretes urea



Which of the following is less toxic form of nitrogenous waste?
a) urea                        
b) uric acid
c) ammonia                 
d) none of these

b

Explanation: uric acid requires just  1 ml water per gram to becomes non-toxic



Excretion of uric acid as nitrogenous waste has evolved in………..
a) terrestrial invertebrates      
b) egg laying vertebrates
c) all invertebrates     
d) both a and b

d

How much water is required to dissolve 1 gram uric acid to nontoxic level?
a) 50 ml                                  
b) 500 ml
c) 1 ml                        
d) 100 ml

c

Explanation: uric acid is the least toxic form of nitrogenous waste, that’s why requires very less amount of water for dilution to non-toxic level.



Animals which excretes uric acid as major nitrogenous wastes are called……
a) ammontelic             
b) uricotelic
c) ureotelic                 
d) nitrotelic

b

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