Origin of Life on Earth

What is the extraterrestrial (panspermia) hypothesis?

• The extraterrestrial (panspermia) hypothesis suggests that life on Earth was created by a divine being.
• The extraterrestrial (panspermia) hypothesis suggests that life on Earth may have originated from microorganisms or organic materials that were transported to Earth from outer space.
• The extraterrestrial (panspermia) hypothesis argues that life on Earth evolved independently from microorganisms present on the planet.
• The extraterrestrial (panspermia) hypothesis proposes that life on Earth originated from volcanic activity.

Tags

NGSS.HS-LS4-1

What is the chemosynthesis (abiogenesis) hypothesis?

• The chemosynthesis (abiogenesis) hypothesis proposes that life on Earth originated from extraterrestrial sources.
• The chemosynthesis (abiogenesis) hypothesis suggests that life on Earth originated from chemical reactions in the early environment

• The chemosynthesis (abiogenesis) hypothesis suggests that life on Earth originated from photosynthesis in deep-sea environments.
• The chemosynthesis (abiogenesis) hypothesis argues that life on Earth originated from volcanic eruptions.

Tiny spherical droplets of assorted organic molecules held together by the forces from a surrounding liquid are also known as?

• colloids
• emulsions
• cells

• coacervates

How long ago did Earth's early life develop?

• 4.5-4.0 Ga

• 540-250 Ma

• 3.8-3.5 Ga

• 65.5-1 Ma

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NGSS.HS-ESS1-6

What are the formations called that contain the oldest evidence for life called?

• fossils
• petrified remains
• ancient organisms
• stromatolites

Tags

NGSS.MS-LS4-1

What do the organisms in the oldest fossils look like?

• cyanobacteria

• fish

• jelly fish

• reptiles

Tags

NGSS.MS-LS4-1

What is a chemotroph?

• An organism that obtains energy by oxidizing inorganic or organic molecules.
• An organism that obtains energy by photosynthesis.
• An organism that obtains energy from the sun.
• An organism that obtains energy by consuming other organisms.