What is a common important adaptation to life on a shore of unconsolidated sediments?
a) filter feeding
b) burrowing in the sediment
c) methods of attachment to a shifting sand bottom
d) breathing water with a heavy suspended sediment load
e) ability to live in brackish water
B
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Agricultural runoff and mine drainage are examples of point sources of pollution.
Answer the following statement true (T) or false (F)
Nitrous oxide enters the atmosphere through the burning of fossil fuels and
A. rice paddies. B. use of fertilizers. C. wetlands. D. cattle.
Groundwater in an aquifer is sometimes called fossil water because ____
A)the water has been in the aquifer for thousands of years B)the water is not being replenished at anywhere near the same rate as when it formed C)tiny microorganisms living in the aquifer are living fossils D)the water has been in the aquifer for a long time and is not being rapidly replenished E)it contains the bones of fossilized animals
What is meant by the term ecological footprint?
A. The amount of coastline inhabited by humans B. The amount of land not affected by human activity C. The total number of ecosystems present on Earth D. The amount of biologically-productive land and sea area needed to support the lifestyle of humans