4. You are a mammal (Class Mammalia). List three characters/traits you share wit

Question

4. You are a mammal (Class Mammalia). List three characters/traits you share with ALL MAMMALS that are NOT shared by ANY OTHER type of animal 4a. Consider the traits you listed in the previous question. Would any of them help you to distinguish a mammal (e.g. you) from any other type of animal (e.g., an earthworm)? Choose one: YES NO (highlight in color and bold) 4b. Consider the same mammal traits. Would any of them, by themselves, help you to distinguish one species of mammal from another species of mammal? Choose one: YES NO (highlight in color and bold) Notice the pattern. Once again, you are using synapomorphies unique to a subset of a larger group in order to distinguish/separate that subset from the larger group.

Explanation / Answer

Mammalian traits: 1.Mammary glands are used to produce milk to nourish their young

2. Their body is maintained at a constant temperature. They generate heat within their bodies metabolically and also have special cooling mechanisms.

3. Viviparous except monotremes which are egg lying.

A 4a) Yes. Based on the above mentioned characters one can distinguish a mammal from other types of animals.

A 4b) No. Since most mammals share a similar kind of trait it would be difficult to distinguish them from one spppecies to the other.

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