Unit 6: Evolution

Most Scientists agree that the Earth is approximately:

• 4.6 trillion years old

• 4.6 billion years old

• 4.6 million years old

ONLY relative dating was used to make the geologic timeline.

• True

• False

Radiometric dating is used to calculate more accurate ages of rocks and fossils.

• True

• False

What important gas allowed for the formation of more complex life like plants and animals?

• carbon dioxide (CO₂)

• oxygen (O₂ & O₃)

• water vapor (H₂O gas)

Which best shows the order of events of early Earth?

• inorganic molecules → prokaryotic cells → organic molecules → eukaryotic cells

• organic molecules → inorganic molecules → prokaryotic cells → eukaryotic cells

• inorganic molecules → organic molecules →prokaryotic cells → eukaryotic cells

Lamarck would say that different traits of organisms happen because:

• increases in population size

• an unchanging environment

• the actions of organisms causes them to use or not use body parts

What are Darwin's patterns of biodiversity?

• species vary globally

• species vary locally

• species vary over time

• all of the above

Why is artificial selection NOT evidence of evolution (or natural selection)?

• artificial selection does not happen in nature, it is controlled by humans

• results of artificial selection are usually questionable

• artificial selection happens faster than natural selection

A human chooses to breed dogs with floppy ears. What is this an example of?

• natural selection

• artificial selection

What did Charles Darwin call the ability of an organism to survive and reproduce in its specific environment?

• diversity

• fitness

• competition