Adistinctive characteristic of mammals that is not observed in other vertebrates is

Which properties describe all matter?

~~16. while watching a special on animals, brianna discovers that hares tend to lose heat through their ears. based on this and what is known about surface-to-volume ratios, propose an explanation as to why hares that live in hot climates (such as the desert) have large, extended ears

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic