On the Hawaiian Islands, Speciation in Drosophila Occurred When a Small

question 40

Multiple Choice

On the Hawaiian Islands, speciation in Drosophila occurred when a small group of males and females colonized a new island, where they faced environmental selection pressures. In addition, sexual dimorphism - and therefore, sexual selection - maintained reproductive isolation from other populations on the new island. These populations, although closely related, remained ecologically different. These events are examples of ____.

• A) a founder effect only
• B) genetic drift only
• C) adaptive radiation only
• D) a founder effect and genetic drift, but not adaptive radiation
• E) a founder effect, genetic drift, and adaptive radiation

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Definitions:

Market-Determined Variables

Economic factors such as prices, wages, and interest rates that are decided by the forces of supply and demand in a free market.

Required Returns

The minimum profit or yield that investors demand for investing in an asset, considering the risk involved.

Risk Premium

The additional return an investor requires to invest in an asset over a risk-free rate, compensating for the risk of the investment.

Yield

The income return on an investment, such as the interest or dividends received, often expressed as an annual percentage based on the investment’s cost, current market value, or face value.