In This Chapter's "Focus on Globalization" Section,scientists Trace the Global

question 39

Multiple Choice

In this chapter's "Focus on Globalization" section,scientists trace the global spread of anatomically modern humans by constructing a global phylogenetic tree based on mtDNA (mitochondrial DNA) .What have we learned from this tree?

• A) Modern humans spread out of Africa over a million years ago.
• B) There was only one wave of migration into North and South America.
• C) The Ice Age temporarily halted early human migrations.
• D) The Americas were settled by multiple haplogroups rather than a single ancestral population.
• E) Human migrations were not influenced by global climate change.

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Definitions:

Depreciation Expense

The allocated portion of the cost of a fixed asset, charged as an expense over its useful life.

Interest Expense

The expenses an entity faces for borrowing money.

Sunk Costs

Costs that have already been incurred and cannot be recovered or altered and should not affect current and future business decisions.

Erosion Costs

Costs incurred when a new project or product negatively impacts the sales and profits of existing products or services.