A. Reptiles and birds B. Reptiles and amphibian C. Birds and annelids D. Insects and amphibian
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A. Annelids B. Molluscs C. Echinodermates D. Platyhelminthes
A. Contractile vacuole B. Food vacuole C. Plasma lemma D. All
A. No separate duct required B. For conservation of water C. For easy removal D. All of these
A. Gills B. Nephron C. Kidney D. Flame cells
A. Urea B. Uric acid C. Amino acid D. Ammonia
A. Allantois B. Chorion C. Urinary bladder D. Ureter
A. Rectal glands B. Green glands C. Sweat glands D. Lacrymal gland
A. Urea B. Ammonia C. Uric acid D. Amino acid