What was the composition of the early atmosphere?
The Earliest Cells

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Biology
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12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
The early atmosphere had very little oxygen.
2.
FLASHCARD QUESTION
Front
What is the plasma membrane?
Back
The plasma membrane is a phospholipid bilayer that surrounds the cell.
3.
FLASHCARD QUESTION
Front
What is cytoplasm?
Back
Cytoplasm is the jelly-like substance within a cell that contains organelles and is the site of many cellular processes.
4.
FLASHCARD QUESTION
Front
What significant event occurred around 2.2 billion years ago in relation to bacteria?
Back
Bacteria started producing oxygen by photosynthesis.
5.
FLASHCARD QUESTION
Front
What are the three domains of life?
Back
The three domains of life are Archaea, Bacteria, and Eukarya.
6.
FLASHCARD QUESTION
Front
What is the function of ribosomes?
Back
Ribosomes are organelles made of protein and RNA that direct protein synthesis.
7.
FLASHCARD QUESTION
Front
What is the role of photosynthesis in early cells?
Back
Photosynthesis allowed early cells, particularly bacteria, to produce oxygen, which changed the composition of the atmosphere.
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