History of Life on Earth

Multiple Choice

Recall! What's an organic molecule?

• One that contains oxygen

• One that has hydrogen bonds

• One that has covalent bonds

• One that contains carbon

Multiple Choice

Which of the following best explains why we care about Miller and Urey's experiment?

• The experiment demonstrated the need for excessive energy in order to create new molecules.

• The experiment showed that life on earth must have formed from space or hydrothermal vents.

• The experiment showed organic molecules forming and organic molecules make up all life on Earth.

• The experiment provided evidence for Darwin's theory of evolution.

Multiple Choice

Which characteristic of life does a microsphere have?

• contains genetic material

• forms a cell

• maintains homeostasis

• has metabolism

Multiple Choice

If scientists are correct, and RNA is the first genetic material, then why does DNA exist?

• RNA is not as stable because it is single stranded.

• RNA is not as versatile because it does not contain uracil.

• RNA is reserved for more simple organisms with simpler proteins.

• RNA is able to escape the nucleus so DNA needed to be made to stay in the nucleus.

Multiple Choice

A fossil found at which layer of the image would be considered the oldest?

• H

• I

• F

• K

• G

Multiple Choice

Which type of fossil dating is typically more accurate?

• relative dating

• radiometric dating

Multiple Choice

Do you need to memorize all the eons, eras, etc?

• Yes

• No

Multiple Choice

Which of the following best explains the importance of the Oxygen Revolution?

• The Oxygen Revolution allowed for the development of photosynthesis, which increased the amount of carbon dioxide in the atmosphere.

• Due to an increase in atmospheric oxygen, aerobic organisms flourished, causing an explosion of cellular respirating organisms.

• Due to more organisms using oxygen, photosynthesis became an outdated mode of providing organisms with energy.

• The Oxygen Revolution allowed for the development of more efficient energy sources, such as fossil fuels.

Multiple Choice

Which of the following provides the best evolutionary relationship between prokaryotes and eukaryotes?

• Prokaryotes worked cooperatively to create a multicellular eukaryote.

• Eukaryotes were formed when prokaryotes underwent endosymbiosis.

• Eukaryotes evolved separately in a phylogenic tree than prokaryotes.

• Prokaryotes evolved from eliminating useless organelles in eukaryotes.

Reorder

Order the following from earliest to latest events occurring in Geological Time?

• Aquatic prokaryotes like cyanobacteria

• Oxygen Revolution

• Ozone Formation

• Land prokaryotes

• Eukaryotes

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Reorder

What is the correct sequence from earliest development to latest development in evolutionary time?

• Cyanobacteria

• Invertebrates

• Mammals

• Reptiles

1

2

3

4

• 1
• 2
• 3
• 4