The introduction of invasive North American ctenophores into the Black Sea and the Sea of Azov has
A) given unexpected help to the fisheries there by providing a new food source.
B) resulted in the extinction of the native European ctenophores.
C) decimated fisheries because the invasive species competes for food with commercial fish species.
D) crippled the tourist industry because ctenophores sting swimmers.
Question 2
Which one of the following is not an example of use of biomass energy of a forest?
A) Indigenous peoples harvest tagua nuts from trees in a rain forest, carve them into animal sculptures, and sell them in the local market to tourists.
B) While hiking through a forest in the Appalachian Mountains, some college students gather dead branches from the ground to make a fire for cooking dinner.
C) Native people living on the Brazilian coast earn money by cutting mangrove trees and converting the wood into charcoal.
D) In downstate Illinois, a farmer cuts up dead standing trees from a forest on his property and delivers the firewood to people living in the suburbs of St. Louis.
A scene from a kelp forest off the west coast of North America. Like terrestrial forests, kelp fores
An 1891 cartoon blames immigrants for the ills of American society: anarchy, socialism, mayhem, and
West facade, Cha1134–1220; south spire, ca. 1160; north spire 1507–13.
Black and white patients enrolled in Medicare do not receive the same medical treatment, even when ...
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