What Is the Single Unique Characteristic That Distinguishes Extant Birds

question 30

Multiple Choice

What is the single unique characteristic that distinguishes extant birds from other extant vertebrates?

• A) endothermy
• B) feathers
• C) an amniotic egg
• D) flight
• E) a four-chambered heart

---

Definitions:

Right-to-Work Laws

Right-to-Work Laws prevent unions and employers from requiring union membership for employment, enhancing individual freedom to choose.

National Labor Relations Board

An independent U.S. federal agency created to enforce labor laws concerning collective bargaining and unfair labor practices, ensuring employees' rights to organize and bargain collectively are protected.

Employee Empowerment

Giving employees responsibility and authority to make decisions regarding all aspects of product development or customer service.

Financial Constraints

Limitations on the availability or use of financial resources that affect an individual's or organization's ability to make decisions or transactions.