One of the students in your study group is struggling with the idea that mammals and vertebrates are separate designations. To illustrate the two terms, you describe an animal that has the expected mammalian characteristics. What should you include in your description of this animal that would make it 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

Option D

Explanation:

The hair/fur present in mammals is indicative of the organism being a mammal instead of just a vertebrate. Other options applies to vertebrates but the presence of hair/fur in mammals differentiates them from other vertebrates including reptiles, amphibians etc.

answer: all : )

explanation:

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.