Question

What are examples of adaptations for flight in birds, loss of complexity or loss of derived traits in Chordates, and convergent evolution in mammals?

Answer 1

Example of adaptations for flight in birds : fusion of caudal bone to form pygostyle and hollow bones of skull, absence of teeth and present of beak, forelimbs modified into wings.

Example of loss of complexity or loss of derived traits in chordates: lack of notochord, dorsal hollow nerve chord and post anal tail in adult chordates.

Example of convergent evolution in mammals: hooves, which have evolved from claws, evolution of the lens of the eye, evolution of prickly protrusions of the skin in some mammals.