Chapter 25

Question 1

What was missing in the atmosphere in early earth?

Answer 1

Oxygen

Question 2

Droplets with membranes that maintained an internal chemistry different form their surroundings

Answer 2

Proto-cells

Question 3

What did Thomas Cech propose was the first genetic material?

Answer 3

RNA

Question 4

What type of rock are fossils found?

Answer 4

Sedimentary

Question 5

Method for determining the absolute age of rocks and fossils based on the half life or radioactive isotopes

Answer 5

Radiometric dating

Question 6

What are the 3 groups of tetrapods?

Answer 6

Amphibians, mammals, reptiles

Question 7

What are the 3 ways of distinguishing mammal fossils?

Answer 7

Jaw, teeth, ear bone

Question 8

Mitochondira, chloroplasts, and plastids originated as prokaryotic cells engulfed by a eukaryotic cell

Answer 8

Endosymbiont theory

Question 9

Movements in the mantle causes the plates to move over time

Answer 9

Continental drift

Question 10

Groups of organisms change from many new species whose adaptations allow them to fill different ecological roles in their communities

Answer 10

Adaptive radiations