The Oxygen in Earth's Atmosphere Was First Created 2

question 69

Multiple Choice

The oxygen in Earth's atmosphere was first created 2.3 billion years ago by:

• A) the impact of a massive comet.
• B) photosynthesis.
• C) the evaporation of water during a warming period.
• D) solar radiation.

---

Definitions:

Risk Nursing Diagnosis

A clinical judgment about individual, family, or community responses to potential health problems/life processes that a nurse identifies as being necessary for intervention to prevent or mitigate problems.

Possible Nursing Diagnosis

A judgment made in a clinical setting about how an individual, family, or community deals with actual or possible health complications or life phenomena.

Symptoms Develop

The emergence or manifestation of signs or indicators of a disease or medical condition in an individual.

Nursing Diagnosis

A professional evaluation of an individual's, family's, or community's response to existing or possible health issues or life events.