The first warm-blooded vertebrates are:

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(C) Warm-blooded animals, or endotherms, are those that can maintain a constant body temperature regardless of the environment. Among the vertebrate c

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Aves

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(C) Warm-blooded animals, or endotherms, are those that can maintain a constant body temperature regardless of the environment. Among the vertebrate classes, $Aves$ (birds) were the first to evolve this trait. $Mammals$ are also warm-blooded, but $Aves$ appeared earlier in the evolutionary timeline as endothermic organisms. Therefore, $Aves$ are considered the first warm-blooded vertebrates.

Similar Questions

$A$: All birds,except the one like Koel (cuckoo),build nests for retiring and taking rest during night time.
$R$: Koel lays eggs in the nests of tailor bird.

Write the characteristic features of class $Aves$.

Which family includes birds?

$S -$ Assertion: Ostrich is an animal belonging to the class Aves.
$R -$ Reason: Ostrich is a flightless bird.

Which of the following is $NOT$ an aerial adaptation of birds?

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