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Which one of the following options gives the correct categorisation of six animals according to the type of nitrogenous wastes (A – Ammonotelic, B – Ureotelic, C – Uricotelic) they give out?
A
A – Aquatic amphibia; B – Cockroach, Humans; C – Frog, Pigeon, Lizards
B
A – Pigeon, Humans; B – Aquatic amphibia, Lizards; C – Cockroach, Frog
C
A – Frog, Lizards; B – Aquatic amphibia, Humans; C – Cockroach, Pigeon
D
A – Aquatic amphibia; B – Frog, Humans; C – Pigeon, Lizards, Cockroach
Detailed Solution
Ammonotelic animals excrete ammonia, which is highly toxic and needs a large amount of water for its removal: many bony fishes, aquatic amphibians and aquatic insects.
Ureotelic animals excrete urea: mammals (humans), many terrestrial amphibians (adult frog) and marine fishes.
Uricotelic animals excrete uric acid as a pellet or paste with minimum loss of water: reptiles (lizards), birds (pigeon), land snails and insects (cockroach).
Checking the six animals: aquatic amphibia are ammonotelic; frog and humans are ureotelic; pigeon, lizards and cockroach are uricotelic.
Hence the correct categorisation is Ammonotelic – aquatic amphibia; Ureotelic – frog, humans; Uricotelic – pigeon, lizards, cockroach.
Ureotelic animals excrete urea: mammals (humans), many terrestrial amphibians (adult frog) and marine fishes.
Uricotelic animals excrete uric acid as a pellet or paste with minimum loss of water: reptiles (lizards), birds (pigeon), land snails and insects (cockroach).
Checking the six animals: aquatic amphibia are ammonotelic; frog and humans are ureotelic; pigeon, lizards and cockroach are uricotelic.
Hence the correct categorisation is Ammonotelic – aquatic amphibia; Ureotelic – frog, humans; Uricotelic – pigeon, lizards, cockroach.