In terms of reproduction,which group of mammals is most similar to their reptilian ancestors?
A)monotremes
B)marsupials
C)placental mammals
D)flying mammals

Question

Quizplus · Accepted Answer

Monotremes are the most primitive group of mammals and lay eggs like their reptilian ancestors. They do not have placental development and have a cloaca, which is a common opening for the urinary, reproductive, and digestive systems. This is similar to reptiles who also have a cloaca. Marsupials and placental mammals, on the other hand, have more advanced reproductive systems with longer gestation periods and the development of a placenta. Flying mammals, such as bats, have a unique reproductive system with females having a long pregnancy followed by the birth of a single offspring that they care for intensively. However, they still have more advanced reproductive systems than monotremes.

In Terms of Reproduction,which Group of Mammals Is Most Similar