The Evolution of Organisms That Use Oxygen in Their Respiration

question 44

Multiple Choice

The evolution of organisms that use oxygen in their respiration was possible only because of the action of a group of bacteria that produced oxygen and changed the Earth's atmosphere from an anoxic one to one rich in oxygen.That group of bacteria was:

• A)cyanobacteria
• B)spirochaetes
• C)proteobacteria
• D)Staphylococcus
• E)actinobacteria

---

Definitions:

Determinants

Factors or elements that contribute to a specific outcome or condition; in health, these could include genetic, lifestyle, and environmental factors.

Physiological

Referring to the functions of living systems and organisms, including their physical and chemical processes.

Two-factor Theory

The two-factor theory of emotion suggests that emotional experiences arise from a combination of physiological arousal and cognitive interpretation of that arousal.

Schachter

Refers to Stanley Schachter, a psychologist known for his work on emotion, specifically the theory that emotions are experienced based on physiological arousal and cognitive interpretation.