When the London Underground (Subway)system Was Built in the Nineteenth

question 50

Multiple Choice

When the London underground (subway) system was built in the nineteenth century,mosquitoes moved into the tunnels and became adapted to biting the customers and small animals that inhabit the subway system.Like people,mosquitoes can freely enter and leave through the tunnel entrances.Recently,DNA analysis and attempts to cross-breed above-ground mosquitoes with underground mosquitoes indicate that there are now two different species.The underground insects are visibly larger.Which term best describes what has happened?

• A)sympatric speciation
• B)behavioral incompatibility
• C)temporal isolation
• D)population bottleneck

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Definitions:

Country A's Exports

Goods and services produced domestically in Country A and sold to buyers in other countries.

Net Exports

The value of a country's total exports minus the value of its total imports; it's a measure used to calculate the trade balance of a country.

Net Capital Outflow

The difference between the domestic savings of a country and its domestic investments, representing the amount of capital that leaves a country to be invested abroad.

Domestic Investment

The total amount of money that is invested within a country's borders by both public and private entities.