Natural Communities Recycle Nutrients, but Cultivated Communities Often Require an Input

question 30

Multiple Choice

Natural communities recycle nutrients, but cultivated communities often require an input of mineral nutrients due to losses through

• A)erosion.
• B)humus.
• C)nitrogen fixation.
• D)crop rotation.

---

Definitions:

Hans Selye

A pioneering Hungarian-Canadian endocrinologist who is known for his research on the stress response and for introducing the concept of stress in medical research.

Stress Response

The body's reaction to a challenge or demand, characterized by physiological and psychological changes that prepare the body to act.

Alarm Phase

The initial stage of the body's response to stress, activating the sympathetic nervous system and the fight-or-flight response.

German-American

A person of German descent who is a citizen of the United States, often contributing to various aspects of American culture and society.