Q.Mention the similarities between Aves and mammals, and between the frog and the crocodile.
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Start your 14-day free trial to unlock the full solution →[!ANSWER] Comparing across the classes surveyed in this chapter highlights both convergences and persistent differences.
Aves and Mammalia independently evolved endothermy (warm-bloodedness), maintaining a constant, typically high body temperature through internal metabolic heat production, regardless of the surrounding environmental temperature — a physiological convergence not shared with fish, amphibians or reptiles (all of which are ectothermic). Both classes also independently possess a fully four-chambered heart, completely separating oxygenated and deoxygenated blood, supporting the high metabolic rates that endothermy demands. Both groups, further, generally show extended and effective parental care of their young (incubation, feeding, protection) compared with most fish, amphibians and reptiles. …
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