Geological Time: Question Preview (ID: 1522)

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What happened to all the continents by the close of the Paleozoic era
a) They fused into Pangea
b) They split in half
c) They formed Gondwanda
d) The moved toward the poles

In early Paleozoic era, life was restricted to the
a) seas
b) air
c) continents
d) islands

What improtant event in animal evolution marks the beginning of the Cambrian eon
a) the appearance of hard parts
b) the ability to fly
c) the ability to swim
d) the appearance of fossils

What event may have triggered the great Paleozoic extinctions?
a) meteorite strike
b) climatic change
c) change in Earth's orbit
d) heightened solar activity

What animals dominated the Mesozoic era
a) dinosaurs
b) fish
c) mammals
d) amphibian

One group of reptiles, characterized by the fossil Archaipteryx, led to the evolution of __________.
a) birds
b) dinosaurs
c) mammals
d) cephalopods

What likely contributed to the extinction tht marks the end of the Mesozoic Era?
a) a meteoric collision
b) global warming
c) an ice age
d) none of the answers are correct

How are mammals distinct from reptiles
a) Mammals have body hair
b) Mammals have lungs
c) Mammals lay eggs
d) Mammals are coldblooded

What principle states that physical, biological and chemical processes we observe today have also operated in the geologic past
a) uniformitarianism
b) cross cutting
c) horizontality
d) unconformity

Fossils rarely preserve the _________ parts of animals because scavengers often eat them and bacteria decompose them
a) soft
b) hard
c) bone
d) dorsal

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