Aquatic amphibians and chondrichthys: 1) Mainly excrete ammonia 2) Excrete urea and ammonia respectively 3) Excrete ammonia and urea respectively 4) Mainly excrete urea
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Step-by-step explanation:
2 option
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Answer:
Excrete ammonia and urea respectively
Step-by-step explanation:
Ostecithes (bony fishes) excrete ammonia
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