Of the following, ________ are pioneer species
A) aspen trees
B) beavers
C) wolves and mountain lions
D) lichens
E) zebra mussels
D
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The diagram below reminds us that
A) ecosystem structures tend to occur on land and ecosystem functions tend to occur on water.
B) ecosystem functions are dynamic processes that support the ecosystem.
C) ecosystem structures and functions are largely the same in most ecosystems.
D) ecosystem functions occur on long time periods.
Nicolas Steno used a mathematical model and the rate of Earth’s cooling to calculate that the age of the Earth must be
20-400 million years old. a. True b. False
Creating artificial cutoffs increases stream velocity
Indicate whether the statement is true or false
________ ozone is harmful, damaging plants and human health while ozone at the ________ level screens out mutagenic ultraviolet radiation.
A. Thermospheric; mesosphere B. Stratospheric; mesosphere C. Tropospheric; stratosphere D. Stratospheric; troposphere E. Mesospheric; thermosphere