Concept #5 Quiz

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Chapter 19

Concept #5 Quiz

Choose the best possible answer to the following questions about Key Concept 5 "The Cenozoic Era: age of mammals"

This activity contains 5 questions.

Match the part of North America with the appropriate description at the beginning of the Cenozoic Era.

A matching question presents 3 answer choices and 3 items. The answer choices are lettered A through C. The items are numbered 1.1 through 1.3. Screen readers will read the answer choices first. Then each item will be presented along with a select menu for choosing an answer choice. Using the pull-down menus, match each item in the left column to the corresponding item in the right column.

	Finishing of the Rocky Mountains, and beginning of the formation of the "basin and range" province.
	tectonically stable, far from plate boundaries
	abundant marine sedimentation after erosion of the Applalachians effectively down to sea level.

1.1 Atlantic and Gulf coasts
1.2 Eastern North America
1.3 Western North America

Which of the following is NOT life that is part of the Cenozoic rock record?

foraminiferadominance of mammals increases with timedominance of reptiles increases with timeflowering plants

Why do mammals replace reptiles in the Cenozoic as the major set of species?

The end of the dinosaur dominance at the end of the Mesozoic Era did not permit mammals to flourish.Reptiles are still dominant, but are now in the shadows for fear of consumption by mammals.The end of the dinosaur dominance at the end of the Mesozoic Era allowed mammals to be dominant.Mammal species took over from the dinosaurs due to the systematic hunting of dinosaurs by humans.

Why are marsupials dominant in Australia, and virtually nowhere else?

Australian continent has been an island, and marsupials evolved independently, largely isolated.Australian mammals are exclusively non-placental.Australian continent is a rifted continent from North America, so no placental mammals evolved there.Australia and South America had a falling out between mammals, resulting in the banishment of the marsupials with the English convicts on Australia.

There is a dearth of marsupial species in South America now, but apparently there were many more species until recently. Why?

The emergence of the Central American land bridge allowed for N. American preditors to kill off the marsupials.The sinking of the Central American land bridge cut off predatorial behavior between N. and S. America.The isostatic rebound of the southern North American continent causes marsupials to drift towards Australia where they thrive today.The sinking of the northern South American continent caused habitat destruction for the marsupials.

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