Chapter 17 Quiz: Question Preview (ID: 18387)

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A very large mass extinction in which amphibians and trilobites disappeared occurred at the end of the
a) Paleozoic Era b) Cambrian Period c) Precambrian d) Quaternary Period
During the Jurassic and Cretaceous periods, the dominant land animals were
a) dinosaours b) amphibians c) grazing mammals d) human ancestors
The process by which two species, for example, a flower and a pollinating insect, evolve in response to each other is called
a) coevolution b) convergent evolution c) adaptive radiation d) punctuated equilibrium
A pattern in which species experience long, stable periods interrupted by brief periods of rapid evolutionary change is called
a) punctuated equilibrium b) adaptive radiation c) convergent evolution d) coevolution
The length of time required for half of the radioactive atoms in a sample to decay is its
a) half-life b) radioactive date c) relative date d) period
The endosymbiont theory proposes that eukaryotic cells arose from
a) individual prokaryotic cells b) multicellular prokaryotes c) communities formed by prokaryotes d) communities formed by eukaryotes
Fossilized evidence of Earth’s first forms of life would consist of
a) vertebrates from the Precambrian b) invertebrates from the Precambrian c) eukaryotes from the Precambrian d) prokaryotes from the Precambrian
Which of the following was NOT characteristic of Earth before the oceans formed?
a) volcanic activity b) bombardment by comets and asteroids c) an atmosphere of poisonous gases d) an atmosphere containing oxygen gas
To formulate a hypothesis about how Earth’s elements were rearranged after melting, scientists considered which physical principle?
a) Denser materials tended to float on less dense materials. b) Less dense materials tended to float on denser materials. c) The most dense materials formed the atmosphere. d) The least dense materials formed Earth’s core.
What does fossil evidence indicate about the order in which these three vertebrates evolved: a bony fish with a jaw, a jawless fish, and a fish with leglike fins?
a) The bony fish evolved before the jawless fish. b) The fish with leglike fins was the last to evolve. c) The jawless fish was the last to evolve. d) The fish with leglike fins evolved before the jawless fish.
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