Marsupials Are a Very Ancestral Form of Mammal,evolving Before Placental

question 56

Multiple Choice

Marsupials are a very ancestral form of mammal,evolving before placental mammals over 70 million years ago.Today Australian marsupials can be compared to placental mammals on other continents.

-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.
• E)living marsupials are little changed from the earliest marsupial fossil forms.

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