When you compare Australian marsupials to placental mammals today
A) the marsupials are all very primitive, having changed very little during the last 70 million years.
B) the marsupials are very similar to placental mammals in the ways they have adapted to similar ecological niches.
C) the marsupials have evolved much more rapidly than placental mammals and are more highly adapted.
D) the marsupial fossils look remarkably similar to the placental mammals of today.
Correct Answer:
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