Test
9.- Ozone layer and eukaryotes show up in the Proterozoic eon
Preguntas del test (9)
11) When do we have the first certainty of life?
- AArchean eon
- BProterozoic eon
- CHadean eon
2When did Proterozoic Eon start up?
- A25 billion years
- B2.5 billion years
- C2.5 million years
3What happened with the oxygen first released by cyanobacteria?
- AIt began to be used by living things
- BIt began to saturate the iron
- CIt killed the rest of living things
4What type of record do we have to use for knowing when oxygen was accumulated first?
- AGeological records
- BEnvironmental records
- CFossil records
5What was GOE (great oxygenation event)?
- AAn increasing of atmospheric oxygen 4.8 million years ago
- BIt becomes an oxygen rich enough environment for eukaryotic cells
- CThe mayor increasing of oxygen ever in our planet
6Why GOE is also known as the “Oxygen Catastrophe”
- AIt produced the biggest fire ever
- BIt oxidized all living things
- CIt killed next to all anaerobic living things (greatest extinction ever)
7Why U.V radiation prevent from life arising on land?
- AIt avoided aquatic living things from come out from water
- BIt produced important damage on DNA
- CIt produced sunburn on living things
8What element permits us to live on land nowadays?
- AThe greenhouse effect
- BThe ozone layer
- CThe high concentration of O2
9What is the relationship between GOE and U.V radiation that allow us to dwell on land?
- AThe ozone/oxygen cycle
- BThe oxygen/U.V radiation interaction
- CThe oxygen/ozone interaction
Información
- Descripción
- 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
- Autor
- Usuario eliminado
- Idioma
- English
- Visitas
- 18
- Historial
- Creado el 6 sep 2016 · actualizado el 7 sep 2016
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