GEOLOGY
PALEONTOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Recent fossil discoveries suggest that some dinosaurs had light, hollow bones.
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All dinosaurs were warm-blooded endotherms.
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Recent fossil discoveries suggest that some dinosaurs had heavy, solid bones.
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Most dinosaurs were cold-blooded ectotherms
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Detailed explanation-1: -In 2011, samples of amber were discovered to contain preserved feathers from 75 to 80 million years ago during the Cretaceous era, with evidence that they were from both dinosaurs and birds. Initial analysis suggests that some of the feathers were used for insulation, and not flight.
Detailed explanation-2: -Darwin’s friend Thomas Huxley noticed similarities between Archaeopteryx and a fossil dinosaur called Compsognathus. Based on these similarities, he proposed that birds were related to dinosaurs.
Detailed explanation-3: -In fact, most dinosaurs with strong evidence of feathers come from within a very select group of theropods known as the Coelurosauria. This includes not only tyrannosaurs and birds, but also the ornithomimosaurs, therizinosaurs and compsognathids.
Detailed explanation-4: -Archaeopteryx was first recognised as a species in the 1860s. It was immediately seized on as evidence for Darwin’s theory of evolution, because it appeared to be a bird with dinosaur-like traits. It had wings and feathers, but teeth instead of a beak.