Paragraf tamamlamaSoru #8588
Complete the paragraph with the most appropriate option:
The evolution of feathers in theropod dinosaurs was long assumed to be a flight adaptation. However, paleontological discoveries of non-avian feathered fossils in northeastern China have completely overturned this assumption. Many of these feathered dinosaurs were ground-dwelling and anatomically incapable of aerodynamic flight. ---- Only much later in evolutionary history were feathers co-opted by early birds for gliding and powered flight.
The evolution of feathers in theropod dinosaurs was long assumed to be a flight adaptation. However, paleontological discoveries of non-avian feathered fossils in northeastern China have completely overturned this assumption. Many of these feathered dinosaurs were ground-dwelling and anatomically incapable of aerodynamic flight. ---- Only much later in evolutionary history were feathers co-opted by early birds for gliding and powered flight.
- A)Tyrannosaurus rex possessed relatively small forelimbs whose exact function remains debated.
- B)Instead, feathers likely evolved initially for thermal insulation, brooding eggs, or species display.
- C)Archaeopteryx is widely regarded as a transitional fossil bridging dinosaurs and modern birds.
- D)Bird bones are uniquely hollow and lightweight to facilitate energy-efficient flight.
- E)Feather colors in fossil specimens can sometimes be deduced from preserved melanosomes.
Cevabı ve çözümü göster
Doğru cevap: B) Instead, feathers likely evolved initially for thermal insulation, brooding eggs, or species display.
Çözüm: Uçamayan dinozorlarda tüy bulunması tüyün başta uçuş için evrimleşmediğini kanıtlamıştır. B şıkkında "Instead, feathers likely evolved initially for thermal insulation, brooding eggs, or species display" denilerek tüyün asıl ilk işlevi (yalıtım, kuluçka, gösteriş) açıklanır ve sonra uçuşa uyarlandığı belirtilir.