The characteristic of prototherians that provides an evidence of evolution of mammals from reptiles is that they have I

Explanation

The characteristic of prototherians that provides evidence of mammalian evolution from reptiles is the presence of a cloaca. This is a single opening used for both excretion and reproduction, a feature they share with reptiles, suggesting an evolutionary link. In contrast, most other mammals have separate openings for these functions.Webbed toes and thick fur are not indicative of reptilian ancestry. Mammary glands, although fundamental to mammals, do not establish an evolutionary connection to reptiles, as they are a distinctive development of mammals.