12 Questions
What is a characteristic of prokaryotic genomic DNA?
It is haploid
What is the term for the process by which genes are transferred from one bacterium to another through viral infection?
Transduction
What is the source of energy for photoautotrophs?
Light
What was a major consequence of the oxygen revolution 2.5 billion years ago?
The increased O2 levels
What was the approximate time when Earth formed?
4.5 billion years ago
What is the term for the process by which bacteria exchange genetic material through direct cell-to-cell contact?
Conjugation
What is a characteristic of prokaryotic ribosomes?
They are the site of protein synthesis
What was the primary reason for the initial low oxygen levels on Earth?
Absence of photosynthesis
What is the term for the alternating layers of red and dark rock formed as a result of oxygen reacting with iron?
Banded iron formation
What was the primary source of energy for ATP synthesis in early life forms?
Oxidation reactions
What is the approximate time when cyanobacteria are thought to have formed?
2.8 billion years ago
What is the term for the classification system that unites bacteria and archaea based on primitive similarities?
Domain classification
Learn about the formation of Earth 4.5 billion years ago, the early anaerobic life forms, and how oxygen levels changed with the evolution of photosynthesis. Discover the evidence of earliest photosynthesis and the role of cyanobacteria in shaping our planet's atmosphere.
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