What Was a Major Waste Product of Photosynthesis Before the Cyanobacterial

question 43

Multiple Choice

What was a major waste product of photosynthesis before the cyanobacterial lineage developed on Earth?

• A) hydrogen sulfide
• B) elemental sulfur
• C) carbon monoxide
• D) ferrous iron

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Definitions:

Observations

The action or process of closely monitoring or noticing something or someone, often to gather data or information.

Agreement

A mutual understanding or arrangement, often formalized, between two or more parties.

Triangulation

A method used in research to increase credibility by combining multiple perspectives, data sources, or methodologies to study a single phenomenon.

Research Methods

Various strategies, techniques, and procedures used to investigate specific questions and test hypotheses in scientific studies.