Question

17.3 compare and contrast the three types of mammals.
match each characteristic with the type of mammal it describes.
give birth to immature young give birth to well - developed young lay eggs

Explanation:

• Eutherians: They give birth to well - developed young. Eutherian mammals have a more complex placenta that allows for a longer gestation period, enabling the young to be more mature at birth.
• Marsupials: Marsupials give birth to immature young. After a short gestation, the underdeveloped young crawl into a pouch (marsupium) where they continue to develop.
• Monotremes: Monotremes are the only mammals that lay eggs. They have a cloaca (a single opening for excretion and reproduction), similar to reptiles and birds, and their reproductive process involves laying eggs.

Answer:

• Eutherians: give birth to well - developed young
• Marsupials: give birth to immature young
• Monotremes: lay eggs