The are a group of vertebrates that have milk-secreting glands and keratin-rich structures that conserve body heat.

Which type of vertebrates have hair and feed their offspring milk?

Which of the following body systems is mainly responsible for generating heat in the human?Group of answer choicesvascularendocrinemuscularnervous

Which of the following structures is LEAST involved in thermoregulation?HairSweat glandsSebaceous glandsCapillaries

The hypothalamusAis a region in the neck involved in hormone production and secretion.Bplays a major role in maintaining an organism’s stable internal body temperature.

Which group would the following organism fall into: one that has hair and mammary glands.Group of answer choicescnidarianpolycheateinsectcrustaceanmammal