Question

Which mammals are oviparous?

• A. Marsupials
• B. Placental mammals
• C. Monotremes
• D. Mammals are not oviparous

Answer 1

The correct option is C Monotremes

Monotremes (Prototheria) are mammals that lay eggs (Platypus is an example) instead of giving birth to live young like marsupials and other placental mammals. Marsupials are mammals that carry their young in a pouch. For example. kangaroo. And true placental mammals are characterized by the presence of the placenta, which facilitates exchange of nutrients and wastes between the blood of the mother and the fetus. The placental mammals include all living mammals except marsupials and monotremes. The placental mammals include diverse forms as whales, elephants, shrews, and armadillos.