Question

multiple choice question
in what group of mammals are young nourished by a placenta inside the mothers uterus during development?
o placentals
o marsupials
o metatherians
o monotremes

Explanation:

Placentals are mammals where the young are nourished by a placenta inside the mother's uterus during development. Marsupials (like kangaroos) have a short - lived placenta and give birth to underdeveloped young that then develop in a pouch. Metatherians is another name for marsupials. Monotremes (like platypus) are egg - laying mammals and do not have a placenta for nourishing the young in the uterus.

Answer:

placentals