Ch. 19 Review - History of life

Fossils can form under 

Which of the following is NOT evidence of endosymbiosis?

Radiometric dating uses ____________________ to figure absolute ages.

What type of rocks are fossils usually found in?

Index fossils are used to

What type of organic molecules did the Miller and Urey experiment create.

What type of organism is found in the earliest known fossils?

Cyanobacteria are

Old rocks can be age dated by using radioactive isotopes with a __________ half life.

Which of these characters reminds you most of Mr. S?

True or False: Earth's early atmosphere contained oxygen.

A fossil that is easily identified, widely found, and short lived is 

Earth's oceans turned from brown to blue after what process evolved?

Which of the following spans the smallest amount of time; Era, Period, or Eon?

What fraction of the original radioactive isotope is left after 3 half lives?

Bones found around an ancient burial ground would most likely be radiometric dated using

Which of the following information can fossils provide paleontologists?

True or False: The early earth lacked oceans because it was too warm.

True or False: Geologic forces on earth have caused changes in earth's living organisms.

Which of these cartoon characters reminds you most of Mr. S?

Some divisions of the geologic time scale are because of 

True or False: Life on earth has caused changes in earth's physical environment.

Using the time scale below, calculate how long the Paleozoic Era lasted.

Half-life refers to the

True or False: One Hypothesis states that DNA came before RNA

Some divisions of the geologic time scale are because of 

What geologic process causes the same fossil to appear on continents thousand of miles apart?

Some divisions of the geologic time scale are because of 

What process allows BACTERIA to change, or increase diversity?

Which of the following spans the largest amount of time; Era, Period, or Eon?