Podcast
Questions and Answers
Describe the evolution of life forms from heterotrophic prokaryotes to autotrophs.
Describe the evolution of life forms from heterotrophic prokaryotes to autotrophs.
The first forms of life were heterotrophic prokaryotes that were anaerobic. Autotrophs evolved later and were able to synthesize organic compounds to survive.
What were the first forms of life and how did they survive?
What were the first forms of life and how did they survive?
The first forms of life were heterotrophic prokaryotes that were anaerobic. They survived by consuming organic matter from their environment.
What are the three distinct lines of evolution that prokaryotes gave rise to?
What are the three distinct lines of evolution that prokaryotes gave rise to?
Prokaryotes gave rise to three distinct lines of evolution: Archeabacteria, Eubacteria, and Eukaryotes.
How did autotrophs evolve and what was their advantage?
How did autotrophs evolve and what was their advantage?
How did the shift from a reducing atmosphere to an atmosphere containing oxygen affect the evolution of early life forms?
How did the shift from a reducing atmosphere to an atmosphere containing oxygen affect the evolution of early life forms?
What are the three distinct lines of evolution that prokaryotes gave rise to?
What are the three distinct lines of evolution that prokaryotes gave rise to?
What was the only process that could have produced oxygen?
What was the only process that could have produced oxygen?
How did the shift in the atmosphere affect the evolution of early life forms?
How did the shift in the atmosphere affect the evolution of early life forms?
When did cyanobacteria start producing oxygen by photosynthesis?
When did cyanobacteria start producing oxygen by photosynthesis?
What process produced oxygen and when did it begin?
What process produced oxygen and when did it begin?
Why did the oxygen produced by cyanobacteria not accumulate in the atmosphere for almost 1 billion years?
Why did the oxygen produced by cyanobacteria not accumulate in the atmosphere for almost 1 billion years?
What happened to the oxygen produced by cyanobacteria in the early earth?
What happened to the oxygen produced by cyanobacteria in the early earth?
When did the concentration of oxygen begin to rise and what was the cause of the accelerated rate of increase?
When did the concentration of oxygen begin to rise and what was the cause of the accelerated rate of increase?
How did the concentration of oxygen change over time and what were the two types of autotrophs mentioned in the text?
How did the concentration of oxygen change over time and what were the two types of autotrophs mentioned in the text?
Flashcards are hidden until you start studying
Study Notes
- The first forms of life were heterotrophic prokaryotes that were anaerobic.
- Autotrophs evolved later and were able to synthesize organic compounds to survive.
- Prokaryotes gave rise to three distinct lines of evolution: Archeabacteria, Eubacteria, and Eukaryotes.
- The shift from a reducing atmosphere to an atmosphere containing oxygen affected the evolution of early life forms.
- Photosynthesis was the only process that could have produced oxygen.
- Cyanobacteria had been producing oxygen by photosynthesis from about 3.5 billion years ago.
- The fossil record shows that for almost 1 billion years, the oxygen produced by cyanobacteria was absorbed by the vast amount of iron in the earth.
- By 2.4 billion years ago, the concentration of oxygen began to rise and the rate of increase accelerated from 2.1 billion years ago.
- Cyano-bacteria are photo-autotrophs and use light as a source of energy.
- Chemo-autotrophs use the energy from chemical reactions to synthesize all necessary organic compounds, starting from carbon dioxide.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
