Theropods are in order of species that have hollow bones and three-toed limbs. What modern-day species are these traits of theropods closely similar to?

Answer 1

Modern-day species that closely resemble theropods in terms of having hollow bones and three-toed limbs are birds. In fact, birds are considered to be direct descendants of theropod dinosaurs. The hollow bones of birds are essential for their lightweight body structure, which aids in flight, while the three-toed limbs are characteristic of both theropods and birds. Additionally, birds share other anatomical features with theropods, such as feathers and a wishbone.