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- 1. Multiple Choice
Cyanobacteria changed the early Earth's atmosphere by giving off...
carbon dioxide
ammonia
hydrogen
oxygen
- 2. Multiple Choice
Eukaryotes may have descended from...
eubacteria
archaebacteria
cyanobacteria
none of the above
- 3. Fill in the Blank
This absorbs ultraviolet radiation
- 4. Multiple Choice
All the living things on Earth today are grouped into...
three kingdoms
four kingdoms
five kingdoms
six kingdoms
- 5. Multiple Choice
Determining the age of a rock by comparing relative proportions of its radioactive isotopes is called...
radioactive decay
radiometric dating
isotope dating
half lives
- 6. Multiple Choice
The first step toward cellular organization may have been the gathering of amino acids into...
macromolecules
coacervates
microspheres
DNA molecules
- 7. Fill in the Blank
This was required by the primordial soup model.
- 8. Multiple Choice
Protists were the first organisms to exhibit cell specialization, which was only possible when they...
grew large enough
became eukaryotic
evolved into fungi, plants, and animals
became multicellular
- 9. Multiple Choice
Organisms were able to live safely on dry land after...
cyanobacteria made oxygen, and ozone began to form
the fifth mass extinction
continental drift stopped
archaebacteria made oxygen, and ozone began to form
- 10. Fill in the Blank
These were the first to lay eggs with shells.
- 11. Multiple Choice
Which of the following enabled the formation of true cells?
the ozone layer
heredity
microspheres
endosymbiosis
- 12. Multiple Choice
In mycorrhizae, fungi provided plants with...
food
energy
minerals
water
- 13. Fill in the Blank
These were the first eukaryotes
- 14. Multiple Choice
Insects probably owe their successful number and diversity to the evolution of...
legs
wings
vision
flowers
- 15. Fill in the Blank
These are the most numerous group of animals
- 16. Multiple Choice
Each of Earth's great mass extinctions have been followed by...
the destruction of Earth's ecosystems
a burst of evolution
geological and weather changes
overpopulation of bacteria
- 17. Multiple Choice
Prokaryotes that lack peptidoglycan in their cells walls are called
eubacteria
Escherichia coli
pre-eukaryotes
archaebacteria
- 18. Multiple Choice
The first animals to live successfully on land were...
amphibians
reptiles
arthropods
flying insects
- 19. Multiple Choice
Fungi, plants, and animals are...
organisms that live only on land
organisms that form mycorrhizae
three successful kingdoms that evolved from protists
three successful kingdoms that evolved from eubacteria
- 20. Multiple Choice
The most successful living vertebrates are...
humans
reptiles
insects
fishes
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