Zoology Chap. 43 - Mammals

Are mammals endotherms or ectotherms? 

• endotherms
• ectotherms

How many chambers do mammal hearts have? 

• 1
• 2
• 3
• 4

Which is not one of the 6 characteristics only mammals have?

• have specialized teeth

• have hair

• produce milk for young

• have a tympanic membrane

Group of organisms that are most closely related to modern mammals 

• reptiles
• synapsids
• fish
• amphibians 

Mammals that lay eggs

• marsupials
• monotremes
• placental 
• mammals 

Mammals that give birth to underdeveloped young that continue to develop in the mother's pouch 

• marsupials 
• monotremes
• placental 
• reptiles 

Mammals that provide nutrients to a fetus in the mother's uterus for a long time before giving birth to a well-developed offspring.

• marsupials
• monotremes
• placental 
• reptiles 

Small sacs on lungs where gas exchange occurs are called ______

• alveoli 
• bronchioles
• trachea
• spleens 

Muscle that contracts to enlarge the chest area in mammals for breathing 

• alveoli
• pyloric sphincter
• diaphragm 
• cloaca

What substance in plants cannot be digested by all mammals? 

• starch 
• protein 
• cellulose
• fat