Some Bird Bones Are Hollow Rather Than Honeycombed

question 86

Multiple Choice

Some bird bones are hollow rather than honeycombed. The hollow bones mostly contain air sacs. The replacement of bone marrow with air sacs is properly understood as an adaptation that ________.
1) reduces the weight of the bird
2) facilitates flight
3) eliminates the functions of bone marrow

• A) only 1
• B) only 2
• C) only 3
• D) 1 and 2
• E) 1, 2, and 3

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Definitions:

Body Mechanics

The application of physical principles to achieve maximum efficiency and to limit risk of physical stress or injury to the practitioner of physical therapy, massage therapy, or chiropractic or osteopathic manipulation.

Aging Population

A demographic trend characterized by an increase in the median age of a population, often due to declining birth rates and increased life expectancy.

Healthcare Services

Professional services rendered by healthcare providers or institutions aimed at preventing, diagnosing, treating, or managing illnesses and disease.

High Standards

Refers to the aspiration or requirement for excellence or superior quality in performance or condition.