NEET BIOLOGY

Detailed explanation-1: -Kangaroo females get pregnant in the regular way. They shed an egg from their ovary and it drifts down the fallopian tube where, if it meets up with sperm, the egg is fertilized and then embeds itself in the wall of it’s mother’s uterus.

Detailed explanation-2: -Marsupials give birth to a tiny, immature embryo. The embryo then continues to grow and develop in a pouch on the mother’s belly. Marsupial development is less risky for the mother. However, the embryo is fragile, so it may be less likely to survive than the fetus of a placental mammal.

Detailed explanation-3: -A marsupial is a therian mammal in which the embryo is born at an early, immature stage. The embryo completes its development outside the mother’s body in a pouch on her belly. Marsupials include the kangaroo, koala, and opossum. Only a minority of therian mammals are marsupials.

Detailed explanation-4: -Marsupials, however, do things a little bit differently. Young develop inside their mother in a uterus (or two) for a short time, but they are born early and finish developing inside a special pouch.