Geology Exam 3 NDSU Questions with correct Answers
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Course
NDSU
Institution
NDSU
Geology Exam 3 NDSU Questions with correct Answers
What are prokaryotes and stromatolites? What do they indicate about life in early Earth history?
Prokaryotes - single celled.
Stromatolites - form these mounds of bacteria.
They indicate that it is very simple. They did not need oxygen telling ...
Geology Exam 3 NDSU Questions with
correct Answers
What are prokaryotes and stromatolites? What do they indicate about life in early Earth
history? - answer Prokaryotes - single celled.
Stromatolites - form these mounds of bacteria.
They indicate that it is very simple. They did not need oxygen telling us that there wasn't
oxygen.
What are banded iron formations? What do they indicate about oxygen in early Earth
history? - answer Occurred when oxygen from the air attached to metals and rusted
them.
We see an increase of oxygen in the air.
What are cyanobacteria and eukaryotes? When do they appear in the rock record? -
answer Cyanobacteria -
Eukaryotes - symbiotic prokaryotes form a eukaryote
They appear 2.1 billion years ago
How did eukaryotes evolve from prokaryotes? - answer When endosymbiosis
happens.
What are metazoans? When do they appear in the rock record? - answer First
animals.
They first appear 900 million years ago.
What are Ediacaran animals and why they are significant? When do they appear in the
rock record? - answer First marine creatures - soft bodied creatures
What are orogens, cratons and provinces? How were they involved in the formation of
Laurentia? - answer Orogens - mountain building areas
Cratons - original piece of the continent - 1st pieces of earth's continental crust
They are involved by starting with a craton then we had different orogenies happen
where different orogenies happen to form Laurentia.
What is the difference between Laurentia and Rodinia? - answer Laurentia - North
America
Rodinia - First super continent
What properties of the rock record distinguishes the Paleozoic from the previous interval
of geologic time? - answer You start to see animals in the rock record. Big
oxygenation event with rifts signifying that showing creatures that need oxygen.
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