Crossbill Birds Have a Beak That Is Designed to Eat

question 113

Multiple Choice

Crossbill birds have a beak that is designed to eat pine cones. If we trim the beak, the bird is unable to eat pine cones. This example illustrates:

• A)fixed behavior.
• B)flexible behavior.
• C)learned behavior.
• D)adaptive behavior.

---

Definitions:

Articles of Confederation

The first written constitution of the United States, in effect from 1781 to 1789, before being replaced by the current U.S. Constitution.

Military Quotas

Predetermined numbers or percentages dictating the recruitment, promotion, or inclusion of individuals within the military, which can encompass various criteria, such as nationality, ethnicity, or gender.

Interstate Commerce

Trade, traffic, or transportation involving the exchange of goods, services, or persons between states.

Declaration of Independence

A fundamental document that declared the thirteen American colonies independent from British rule in 1776.