The Predatory Fish Rely on Visual Cues and Speed to Capture

question 17

Multiple Choice

The predatory fish rely on visual cues and speed to capture mosquitofish.Mosquitofish rely on speed and visual cues to avoid the predatory fish.Which adaptation(s) might help the predators survive in ponds that are home to faster mosquitofish?
1) directional selection for increased speed
2) stabilizing selection for speed that matches that of the mosquitofish
3) change in hunting behavior that replaces reliance on visual cues with reliance on tactile cues
4) change in hunting behavior that eliminates speed in favor of better camouflage,which permits an ambush strategy

• A)1 only
• B)2 only
• C)either 1 or 3
• D)1,3,or 4

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Definitions:

Fixed-cost Financing

Refers to the method of raising capital where the company incurs fixed financial charges, such as interest on bonds or dividends on preferred stock, regardless of its financial performance.

Financial Leverage

A strategy involving the use of borrowed money to increase the potential return of an investment.

Operating Leverage

The use of fixed as opposed to variable cost in a firm’s cost structure.

Combined Leverage

Refers to the use of both operating and financial leverage by a company to assess the potential impact on earnings due to changes in sales.