Which type of soil is generally reddish in color from iron oxides?
a. andisol
b. histosol
c. inceptisol
d. laterite
e. gelisol
d
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In science, a theory is
A) an educated guess. B) less than a fact. C) a synthesis of a large body of well-tested knowledge. D) unchangeable.
Zooplankton populations in Lake Erie and the Hudson River have declined by up to 70% since the arrival of zebra mussels because ________
A) waste from zebra mussels promotes bacterial growth that kills zooplankton B) zebra mussels carry a parasite that kills zooplankton C) zebra mussels feed on phytoplankton, which zooplankton need as a food source D) zebra mussels prey exclusively on zooplankton E) zebra mussels block sunlight penetration into lakes and thus prevent zooplankton from photosynthesizing
Biological weathering includes processes that are fundamentally physical or chemical in nature
a. True b. False Indicate whether the statement is true or false
Soil material is actually small bits of rocks and composed of ________
A) humus B) loam C) silica D) hydrogen E) air