Cyanobacteria Are Believed to Generate the Majority of Oxygen Gas

question 13

Multiple Choice

Cyanobacteria are believed to generate the majority of oxygen gas in Earth's atmosphere. What allows them to produce oxygen?

• A) photosynthesis in which H₂S is the electron source
• B) photosynthesis in which water photolysis produces H⁺, e^-, and O₂
• C) bacteriorhodopsin-based photosynthesis
• D) being near the surface of a pond where more oxygen is available
• E) possession of a variety of chlorophylls to absorb a wide range of wavelengths of light

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Definitions:

Eukarya

One of the three domains of life, consisting of organisms with cells characterized by a nucleus enclosed within membranes.

Systematic Biology

A branch of biology that focuses on classifying organisms and determining their evolutionary relationships.

Evolutionary Relationships

The connections among species or groups of organisms based on their common ancestry, typically illustrated through phylogenetic trees.

Lamarck

Refers to Jean-Baptiste Lamarck, an early 19th-century scientist known for his theory of inheritance of acquired characteristics.