Suggested answers for questions on the Mammoth Extinction student sheet can be found below:
Besides MacPhee’s theory of a lethal virus, what are the main theories described as to what caused the massive mammalian extinctions featured in this article?
(They are climate change, over hunting by humans, or a combination of both.)
Why did MacPhee choose Wrangel Island as the best place to look for evidence of his theory?
(Mammoths on Wrangel Island persisted about 6,000 years longer than anywhere else and it seemed more likely that the fossil remains might yield traces of a virus.)
What is a megafauna?
(A mammal weighing more than 100 lbs.)
What were the two unique features of the late Quaternary extinctions noted by MacPhee?
(1. They were unevenly distributed geographically, e.g., losses were heavier in the Americas and Australia than in African or Eurasia. 2. Extinctions followed the emergence of humans or their arrival in specific areas.)
Why do we seem to know more about mammoths than other extinct, prehistoric animals?
We seem to know more because they were relatively abundant and because a significant number of well-preserved carcasses have been found. Not only that, but they were also the subject of numerous cave drawings
Size among the mammoths seemed to have varied considerably. To what might this be attributed?
What do the shape and size of the mammoth’s tusks indicate that they might have been used for?
They indicate that the tusks might have been used to uncover vegetation buried in the snow
What is the relationship of the mammoth to the modern elephant?
Contrary to what some might believe, the elephant did not descend from the mammoth. Rather, the two groups evolved from separate branches of the family tree. Though mammoths died out while elephants persist, both groups co-existed on earth for four million years.
According to some scientists, should the mammals have become extinct?
No, the mammoths had many favorable traits for survival, such as a broad, geographic range and no natural predators besides humans