The first warm-blooded animals to evolve were?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the ASBOG Fundamentals of Geology exam. Access flashcards, multiple-choice questions, and understand key geologic principles. Prepare confidently for your exam!

Multiple Choice

The first warm-blooded animals to evolve were?

Explanation:
Warm-bloodedness evolved in two separate vertebrate lineages: the mammal lineage (synapsids) and the dinosaur–bird lineage (diapsids). The earliest endothermic animals come from the mammal side, with evidence pointing to higher metabolic rates developing in mammal-like ancestors during the late Triassic. Birds later evolved endothermy independently from theropod dinosaurs, but they appear in the fossil record well after the first mammals. Reptiles and amphibians are ectothermic, relying on environmental heat. So while birds and mammals are both warm-blooded, the earliest warm-blooded animals were mammals, with birds joining in later as a separate evolution of endothermy.

Warm-bloodedness evolved in two separate vertebrate lineages: the mammal lineage (synapsids) and the dinosaur–bird lineage (diapsids). The earliest endothermic animals come from the mammal side, with evidence pointing to higher metabolic rates developing in mammal-like ancestors during the late Triassic. Birds later evolved endothermy independently from theropod dinosaurs, but they appear in the fossil record well after the first mammals.

Reptiles and amphibians are ectothermic, relying on environmental heat. So while birds and mammals are both warm-blooded, the earliest warm-blooded animals were mammals, with birds joining in later as a separate evolution of endothermy.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy