Cyanobacteria Are Believed to Generate the Majority of Oxygen Gas

question 64

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:

Genetic Engineering

The direct manipulation of an organism's genes using biotechnology to alter its characteristics.

Biodiversity

The variety and variability of life on Earth, encompassing the diversity of ecosystems, species, and genes.

Speciation

The process through which new genetically distinct species evolve from a single ancestral species.

Geographic Isolation

A situation where a population of species is physically separated from exchanging genetic material with other populations due to geographical barriers, leading to divergent evolution.