The Bones in a Bird Are Hollow, Reducing Its Weight

question 41

Multiple Choice

The bones in a bird are hollow, reducing its weight for flight. This is an example of which characteristic of life?

• A) Living organisms grow and develop.
• B) Living organisms acquire materials and energy from the environment.
• C) Living organisms reproduce.
• D) Living organisms adapt to their environment.
• E) Living organisms are homeostatic.

---

Definitions:

Structurally

Relating to or pertaining to the arrangement of and relations between parts or elements of a complex entity.

Ammonia

A compound of nitrogen and hydrogen (NH3) with a distinct pungent smell, used widely as a fertilizer and cleaning agent.

Lewis Structure

Representation of the distribution of electrons in molecules, showing how atoms are connected and where lone pairs of electrons are located.

Hydrogen Sulfide

A colorless, poisonous, flammable gas with the characteristic foul odor of rotten eggs; used in the manufacture of chemicals, in metallurgy, and as a fungicide and insecticide.