One of the student in your study group is struggling with the idea that mammals and vertebrates are separate designation. To illustrate the two term, you describe an animal that has the expected mammalian characteristics. What should you include in your description of this animal that would make clear that the animal is specifically a mammal and not just a vertebrate (check all that apply)

A) Hair

B) Notochord at some point during development

C)Cranium

D)Four limbs

E)specialized teeth

A) Hair

E) specialized teeth

Explanation:

The Mammals are the group of animals which possess mammary glands. The mammals can be distinguished from the vertebrates as they possess certain features which are unique to them like:

1. The presence of hairs on body which provides protection to the skin used as camouflage and provides insulation.

2. They possess teeth in their lower and upper jaws which can be replaced once in their lifetime.

3. The presence of a four-chambered heart.

4. Presence of mammary glands.

Thus, the selected option is correct.