The End-Paleogene Appearance of Primates, Ungulates, and Opossums in North

question 7

Multiple Choice

The end-Paleogene appearance of primates, ungulates, and opossums in North America was due to habitat changes associated with

• A) less oxygen in the atmosphere.
• B) climatic warming.
• C) sea-level change.
• D) loss of forest habitat.

---

Definitions:

Nullification Theory

A legal theory suggesting that U.S. states have the right to nullify, or invalidate, any federal law which they deem unconstitutional.

Dual Federalism

A political arrangement in which power is divided between federal and state governments in clearly defined terms, with state governments exercising those powers accorded to them without interference from the federal government.

Concurrent Powers

Concurrent powers are political powers that are shared by both the federal and state governments in the United States, including the powers to tax, build roads, and create lower courts.

Grants-in-Aid

Financial contributions provided by the federal government to state or local governments for specific projects or programs, often with conditions attached to their use.