A Hybrid Zone Between Two Species of Butterflies Contains Individuals

question 57

Multiple Choice

A hybrid zone between two species of butterflies contains individuals with widely varying genotypes, ranging from those matching both parental species to those with varying proportions of genes from the parental species.From this information one can infer that

• A) prezygotic isolating mechanisms are maintaining the hybrid zone.
• B) postzygotic isolating mechanisms are maintaining the hybrid zone.
• C) the hybrid zone is relatively old.
• D) the hybrid zone is relatively new.
• E) the hybrid zone has been reinforced.

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Definitions:

Dividend

A payment made by a corporation to its shareholders, usually as a distribution of profits.

Retained Earnings

The portion of net income that is kept by a company instead of being paid out as dividends to shareholders, contributing to the company's equity.

Paid-in Capital

The amount of money that a company receives from its shareholders in exchange for shares of stock.

Declaration Date

The date on which a company's board of directors announces its intention to pay a dividend.