Feathers in Birds Appear to Have First Been Selected for as Insulation

question 1

Multiple Choice

Feathers in birds appear to have first been selected for as insulation but later conveyed a new advantage in helping create light aerodynamic surfaces. This switch in function is an example of ________.

• A)allopatric speciation
• B)a prezygotic barrier
• C)an exaptation

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Definitions:

Past Consideration

A term in contract law meaning that an act done before a contract is made is not good consideration for the contract.

Sales Contract

A legal agreement between a buyer and a seller detailing the terms and conditions of a sale of goods or services.

Equitable Exchange

A transaction in which goods, services, or assets are traded based on fairness and balance in value.

Irrevocable Oral Promise

A spoken commitment that cannot be canceled or revoked, legally binding under specific circumstances.