The drastic reindeer population changes on St. Matthew Island appears to have ultimately been caused by
A) the absence of any predators.
B) the addition of a keystone species.
C) the narrow reliance of reindeer on just a single food species.
D) the introduction of grizzly bears to the island in 1962.
A
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Annual mean temperatures are rarely taken and have little utility to scientists
Indicate whether the statement is true or false
Urban sustainability advocates urge us to ________
A) use renewable energy sources and recycle materials B) maintain a steady pattern of growth and development C) oppose strict limits on growth (UGBs) D) find a balance between imports and exports of resources E) use zoning and taxation to promote livable cities
The UN Population Fund indicates that about 40% of all pregnancies in less-developed countries are unplanned, while about half end with abortion.
Answer the following statement true (T) or false (F)
Environmental government policies and regulations are applied at the
A) federal level only. B) state and federal levels. C) local, state, and federal levels. D) local level only.