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Question 16 1 pts Which of the following statements concerning mammals, mammal evolution, or the post K-Pg extinction recovery is FALSE? Prior to the K-Pg extinction, most mammals were small nocturnal insectivores, although they also included some arboreal and gliding forms. In the wake of the dinosaurs' extinction, mammals were the very first group to radiate, which is why they came to dominate land communities. Terrestrial crocodiles, snakes, and birds were the first large animals after the K-Pg extinction, as it took time for mammals to become large. Of the three living groups of mammals, monotremes appear to have arisen first and have more ancestral traits like egg-laying and cloacas. Most living mammal species are members of the placental group, which appears to have arisen during or shortly after the K-Pg extinction