Early Earth's Atmosphere & Origin of Life Quiz

Which gas was largely absent from Earth's early atmosphere, a condition that allowed for the synthesis of organic molecules?

• Methane (CH4)

• Ammonia (NH3)

• Water vapor (H2O)

• Oxygen (O2)

Tags

NGSS.HS-ESS1-6

The famous Miller-Urey experiment demonstrated that the conditions of early Earth could have produced which of the following?

• Amino acids

• Complex eukaryotic cells

• Microspheres

• DNA

Tags

NGSS.HS-LS1-6

What was the primary energy source used to simulate lightning in the Miller-Urey experiment?

• Ultraviolet radiation

• Volcanic heat

• Electrical sparks

• Gamma rays

Tags

NGSS.HS-PS2-5

According to the primordial soup hypothesis, where did the accumulation of simple organic molecules occur on early Earth?

• In deep-sea hydrothermal vents

• On the surface of clay minerals

• In the atmosphere

• In the oceans or 'warm little ponds'

What is the panspermia hypothesis?

• The theory that life originated from an RNA molecule.

• The idea that life began on land in a hot, dry environment.

• The theory that life's building blocks, or even life itself, were brought to Earth by comets or meteorites.

• The hypothesis that life arose in deep-sea vents.

How did the early atmosphere get its gases, such as water vapor, carbon dioxide, and nitrogen?

• Photosynthesis by early bacteria

• Meteorite impacts

• Volcanic outgassing

• Condensation from outer space

What are microspheres, and why are they considered significant in the study of abiogenesis?

• Early forms of prokaryotes that evolved into eukaryotes.

• The first self-replicating molecules on Earth.

• Simple, membrane-bound structures that can exhibit some life-like properties, suggesting how the first cells may have formed.

• Complex organic polymers found in deep-sea vents.

The transition from a reducing atmosphere to an oxidizing atmosphere was primarily caused by the rise of which life form?

• Early protocells

• Archaea

• Photosynthetic prokaryotes, like cyanobacteria

• Eukaryotic cells

What is the name for the period when photosynthetic organisms began producing large amounts of oxygen, fundamentally changing the composition of the atmosphere?

• The Great Oxidation Event

• The Cambrian Explosion

• The Oxygen Revolution

• Both A and C

The endosymbiotic theory explains the origin of which type of cell?

• Prokaryotic cells

• Eukaryotic cells

• Protocells

• Early archaea