Mammals

Which of the following is a characteristic that all mammals share?

• they all have a pouch

• they give their young milk

• they all lay eggs

Which of the following is a structure that mammals share that enables them to feed their young?

• specialized teeth

• mammary glands

• endothermy

• completely divided heart

Which group of mammals give birth to immature young that continue to develop in the mother's pouch?

• monotremes

• marsupials

• placental

Which group of mammals has a long gestational period?

• monotreme

• placental mammals

• marsulpial

Monotremes are the only group of mammals that

• lay eggs
• have hair
• feed their young with milk
• are endotherms

Most mammals are

• monotremes
• marsupials
• placental mammals
• placental marsupials

What is the function of the placenta?

• production of milk
• exchange of materials between fetus and mother
• digestion of food
• protection of a young mammal after birth

These are all characteristics of mammals except...

• All mammals regulate body temp internally

• All mammals have hair

• All mammals have a single jawbone

• All mammals teeth are uniform or the same