What is the tidal datum in reference to regions with semidiurnal tides?
a. mean sea level
b. mean lower low water
c. tidal range
d. mean tide
e. mean low water
e
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Estuaries are categorized by ____
A) location or latitude B) circulation patterns C) the ratio of fresh water to salt water D) sediment origins and age
In 2012, fish production provided between ________ of the annual protein consumption by humans globally.
A. 17 to 70 percent B. 70 to 90 percent C. 25 to 50 percent D. 0 to 100 percent E. 22 to 88 percent
What are the current patterns and problems regarding migration to and within Europe today?
What will be an ideal response?
The lesson of Easter Island is that ________
A) we never comprehend resource issues until the resources are gone B) grassroots organizations must be involved to ensure sustainable societies C) economics is an important facilitator of sustainable societies D) conservation of resources is necessary for sustainable societies E) political and governmental support are required to ensure sustainable societies