Why Do Some Drosophila Reject the Sperm of Another Species

question 59

Multiple Choice

Why do some Drosophila reject the sperm of another species?

• A) because of a gametic isolation
• B) because of a hybrid breakdown
• C) because of a hybrid inviability
• D) because of a mechanical isolation

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Definitions:

Stock Listing

The inclusion of a company's shares on a stock exchange where they can be bought and sold by investors.

P/E

The price-to-earnings ratio, measuring a company's current share price relative to its per-share earnings.

YTD% Chg

Year-To-Date Percentage Change, a financial metric indicating the percentage change in the value of an investment since the beginning of the current calendar year.

Obligatory Sinking Fund

A financial strategy in which a company sets aside money over time to retire its debt securities or preferred stock gradually, reducing default risk.