Origin of Life Biology Honors

What were the first cells hypothesized to have existed on earth.? Anaerobic- because there was no ____

• water

• hydrogen

• oxygen

Anaerobic created energy (ATP) without oxygen; ATP uses

• glycolysis

• photosynthesis

• fossil fuels

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

Heterotrophs are less complex than autotrophs.

• True

• False

What is less complex than eukaryotic cells and lacks membrane-bound organelles and nuclei?

• Heterotrophs

• Prokaryotes

• Autotrophs

Prokaryotes existed only after eukaryotic cells.

• True

• False

A 3.5 BYO microfossil is the oldest microfossil and was a _____ cell.

• Eukaryotic

• Autotrophic

• Heterotrophic

• Prokaryotic

Finish the order of the evolution of prokaryotic organisms.

*Began with:

Anaerobic heterotrophic prokaryote (next came) >

• photosynthetic autotroph > chemosynthetic autotroph > Aerobic organisms

• chemosynthetic autotroph > Aerobic organisms >photosynthetic autotroph

• chemosynthetic autotroph > photosynthetic autotroph > Aerobic organisms

Organism used ____ because of the harsh environment they lived in and because of the inorganic compounds available such as sulfur and ___.

• chemosynthesis, O2 (water)

• chemosynthesis, CO2

• glycolysis, CO2

Photosynthetic autotrophs evolved next, because of ___.

• harsh environment

• competition

• atmosphere

• lack of resources

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-5

The first autotrophic prokaryote (3.5BYO) was ...

• cyanobacteria

• blue-green algae

• microscopic organisms

• found naturally in all types of water

• All of the Above