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Geol 1404 Ch 12

Test 3

QuestionAnswer
The significance of Walcott's discovery of the Burgess Shale was that it was the first discovery of a unique assemblage of fossils of soft-bodied animals
The age of the Burgess Shale is Middle Cambrian
The unique preservation of soft-bodied fauna in the Burgess Shale occurred because of all of the following except: animals and plants were carried by turbidity
Which of the following is NOT a function of an exoskeleton Increase efficiency in reproduction
Which of the following is NOT on of the basic feeding groups inhalation feeders
Which of the following is NOT an example of a pelaic organism worm
Which are the basic types of organisms in present day marine environments? plankton, nekton, benthos
Which is the correct order of trophic levels from bottom to top? Primary producer, primary consume, secondary consumer, tertiary consumer
Which of the following does NOT apply to trilobites? abundant in modern oceans
Which of the following is a planktonic animal that is an excellent guide fossil, based on its short appearance in the fossil record? graptolites
Conodonts are excellent index fossils because: they have widespread geographic extent and their fossils are present in a very short span of geologic time (A and C)
Mass extinctions at the end of the Ordovician occurred because of dramatic changes related to glaciation
The mass extinction at the end of the Ordovician set the stage for groups of organisms to diversify and Groups of organisms to withdraw from previous habitats (B and D)
How can we classify phytoplankton within a food web? primary producer
These organisms contributed large amounts of skeletal debris to Mississippian sedimentary rocks: crinoids
Created by: SarahElaine
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