The Accumulation of Free Oxygen in Earth's Atmosphere Began

question 23

Multiple Choice

The accumulation of free oxygen in Earth's atmosphere began

• A) with the origin of life and respiratory metabolism.
• B) with the origin of photosynthetic bacteria that had photosystem I.
• C) with the origin of cyanobacteria that had both photosystem I and photosystem II.
• D) with the origin of chloroplasts in photosynthetic eukaryotic algae.
• E) with the origin of land plants.

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Definitions:

Absolute Concept

A theory or principle that is considered universally valid or applicable, without any conditions or exceptions.

Inner-City Communities

Urban neighborhoods that may be characterized by higher-density housing, lower income levels, and often, but not always, higher rates of crime and poverty.

Social Organization

The structured arrangement of relationships and roles within a society, guiding how members interact and behave.

Aberrant Behavior

Actions or behaviors that significantly deviate from what is considered typical or normal by society.