Question: The two subdivisions of what group include Palaeognathae and Neognathae?
Sentence: All modern birds lie within the crown group Aves (alternately Neornithes), which has two subdivisions: the Palaeognathae, which includes the flightless ratites (such as the ostriches) and the weak-flying tinamous, and the extremely diverse Neognathae, containing all other birds.
Answer in sentence: yes