Refer to the Following Information to Answer the Questions Below

question 12

Multiple Choice

Refer to the following information to answer the questions below.
Fossils of Lystrosaurus, a dicynodont therapsid, are most common in parts of modern-day South America, South Africa, Madagascar, India, South Australia, and Antarctica. It apparently lived in arid regions, and was mostly herbivorous. It originated during the mid-Permian period, survived the Permian extinction, and dwindled by the late Triassic, though there is evidence of a relict population in Australia during the Cretaceous period. The dicynodonts had two large tusks, extending down from their upper jaws. The tusks were not used for food gathering, and in some species were limited to males. Food was gathered using an otherwise toothless beak. Judging from the fossil record in sedimentary rocks, these pig-sized organisms were the most common mammal-like reptiles of the Permian.
-How many of Lystrosaurus' features below can help explain why these organisms fossilized so abundantly?
I.the presence of hard parts, such as tusks
II.its arid environment
III.its persistence across at least two geological eras
IV.its widespread geographic distribution
V.its mixture of reptilian and mammalian features

• A) only one of these statements
• B) two of these statements
• C) three of these statements
• D) four of these statements
• E) all five of these statements

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