A fish propels itself through water mainly by
A. deflecting water downward.
B. pushing water backward.
C. wiggling its tail.
D. pushing forward.
Answer: B
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What type of magma is typically generated along subduction zones?
a) ultramafic b) mafic c) intermediate d) depends on the location of the subduction zone e) magma is not generated along subduction zones, they only form mountains
____________ is the study of layered sediment deposits. Fill in the blank(s) with the appropriate word(s)
Fusulinids, greatly diversified in the Pennsylvanian and Permian, are one of the most useful guide fossils for those periods
Indicate whether the statement is true or false
Fossil fuels represent
A) a large amount of Paleozoic and Mesozoic biomass buried anaerobically millions of years ago. B) natural deposits of organic materials that formed long before life on Earth evolved. C) the remains of fossil animals that lived a few thousand years ago. D) sustainable sources of energy that are underused today.