Animal Diversity Web KEY

Part A: Click on "Mammals"

1. What three characteristics do mammals have that no other animals has? 3 middle ear bones, hair, and mammary glands.

2. Name three functions of mammalian hair:
_ insulation, color patterning, and aiding in the sense of touch. _

3. (Physical Description)

Mammals are characterized by their highly differentiated _teeth_.
The lower jaw of a mammal is made of a _single____ bone.
Mammals have __4____ chambered hearts.

4. (Development) What are the three major groups of mammals?

Monotremes (Prototheria) , Marsupials (Metatheria), placental mammals (Eutheria)

5.(Reproduction) What percentage of mammals are monogamous? What does it mean to be monogamous?

males only mating with a single female each season.

6. (Communication and Perception) Describe one way that mammals communicate with each other?

scent marking, pheremones, vocalizations, touch

Part B: Click on Members of this Class at the top of the page. You will be investigating a few major groups of mammals. Pick a subclass or order and fill out the table based on the information listed on the site. Note that the page has reference icons to help you.

Order, Suborder or Infraclass	Family	Types of Animals	Interesting Fact, or What makes this group distinct?	Habitat
ANSWERS VARY DEPENDING ON WHICH ANIMAL WAS CHOSEN TO INVESTIGATE