9.- Ozone layer and eukaryotes show up in the Proterozoic eon

PEDRO ALVAREZ JIMENEZ
Quiz by PEDRO ALVAREZ JIMENEZ, updated more than 1 year ago
PEDRO ALVAREZ JIMENEZ
Created by PEDRO ALVAREZ JIMENEZ over 6 years ago
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Description

https://www.khanacademy.org/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/v/ozone-layer-and-eukaryotes-show-up-in-the-proterozoic-eon

Resource summary

Question 1

Question
1) When do we have the first certainty of life?
Answer
  • Archean eon
  • Proterozoic eon
  • Hadean eon

Question 2

Question
When did Proterozoic Eon start up?
Answer
  • 25 billion years
  • 2.5 billion years
  • 2.5 million years

Question 3

Question
What happened with the oxygen first released by cyanobacteria?
Answer
  • It began to be used by living things
  • It began to saturate the iron
  • It killed the rest of living things

Question 4

Question
What type of record do we have to use for knowing when oxygen was accumulated first?
Answer
  • Geological records
  • Environmental records
  • Fossil records

Question 5

Question
What was GOE (great oxygenation event)?
Answer
  • An increasing of atmospheric oxygen 4.8 million years ago
  • It becomes an oxygen rich enough environment for eukaryotic cells
  • The mayor increasing of oxygen ever in our planet

Question 6

Question
Why GOE is also known as the “Oxygen Catastrophe”
Answer
  • It produced the biggest fire ever
  • It oxidized all living things
  • It killed next to all anaerobic living things (greatest extinction ever)

Question 7

Question
Why U.V radiation prevent from life arising on land?
Answer
  • It avoided aquatic living things from come out from water
  • It produced important damage on DNA
  • It produced sunburn on living things

Question 8

Question
What element permits us to live on land nowadays?
Answer
  • The greenhouse effect
  • The ozone layer
  • The high concentration of O2

Question 9

Question
What is the relationship between GOE and U.V radiation that allow us to dwell on land?
Answer
  • The ozone/oxygen cycle
  • The oxygen/U.V radiation interaction
  • The oxygen/ozone interaction
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