Topic 4: II History Of Life

Question 1

II)History of Life
A)early life
When did the first prokaryotes pop up

Answer 1

3.5 billion years ago

Question 2

II)History of Life
A)early life
Was there a lot of oxygen? What type of bacteria were present as a result?

Answer 2

There was little oxygen, they were all heterotrophic bacteria

Question 3

II)History of Life
A)early life
Are heterotrophic bacteria anaerobic of aerobic?
What specific process do heterotrophs use

Answer 3

Anaerobic
Fermentation

Question 4

II)History of Life
A)early life
During early life there was a rise in a specific gas that killed most anaerobic organisms:what was it ?

Answer 4

Oxygen

Question 5

II)History of Life
A)early life
Who were the survivors of the rise in O2 during early life?

Answer 5

Aerobic bacteria: the used o2 for cell respiration