OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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some theropods had gizzards and hollow bones like birds
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their DNA is very similar
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they have all of the intermediate fossils between them
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theropods all had feathers
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scientists found collagen in fossils of theropods
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Detailed explanation-1: -These small, two-legged dinosaurs called theropods scurried around something like today’s roadrunners. Many characteristics that typify birds were present in the theropods before birds evolved, including hollow bones, a wishbone, a backward-pointing pelvis, and a three-toed foot.
Detailed explanation-2: -But studies have shown that Allosaurus, a fairly primitive theropod, also had hollow bones. Allosaurus was a big animal with tiny arms, so it wasn’t flying anywhere-like so many other bird traits, hollow bones appear early in the dinosaur family tree.
Detailed explanation-3: -Among the features linking theropods to birds are the three-toed foot, a furcula (wishbone), air-filled bones, and (in some cases) feathers and egg brooding. Sinosauropteryx is the first and most primitive genus of dinosaur found with fossilized impressions of feathers.
Detailed explanation-4: -A few palaeontologists, such as Gregory S. Paul, have suggested that some or all of these advanced theropods were actually descended from flying dinosaurs or proto-birds like Archaeopteryx that lost the ability to fly and returned to a terrestrial habitat.