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Why does the aquarium trade contribute to the introduction of nonnative species? a. Exotic species can escape or be released into local ecosystems. b. Aquarium owners do not always understand how ecosystems interact. c. Nonnative fish are shipped worldwide for aquariums. d. All of the above
Weegy: The aquarium trade contribute to the introduction of nonnative species d. All of the above User: Which of the following is an example of mechanical control of nonnative species? a. pesticides b. herbicides c. net barriers d. inspections Weegy: The answer is c. net barriers User: Why might it be beneficial to regulate what species of plants and animals people are allowed to own in particular environments? a. Some species might become invasive and destructive if they escaped. b. Some species may be dangerous to humans. c. Nonnative plants and animals should only be used for commercial purposes. d. There is no reason to restrict an individuals’ right to own plants or animals. User: Invasive species often unbalance the ecosystems into which they are introduced because _______. a. they did not co-evolve with the natural species and lack natural controls, like predators b. they breed quickly and have the potential to overpopulate an area c. they consume local resources d. none of the above Weegy: Invasive species often unbalance the ecosystems into which they are introduced because they did not co-evolve with the natural species and lack natural controls, like predators. User: Why has the spread of the herbicide-resistant hydrilla through Florida’s waterways resulted in them no longer being navigable by most boats? a. Thy hydrilla has induced a drought that drained the waterways. b. The weed clogs propellers that boats use for propulsion. c. The sticky leaves of the weed hold boats in place. d. All of the above Weegy: Why has the spread of the herbicide-resistant hydrilla through Florida’s waterways resulted in them no longer being navigable by most boats? a. Thy hydrilla has induced a drought that drained the waterways. [ [ ] ] User: All nonnative species in an ecosystem are considered invasive species. true or false Weegy: All nonnative species in an ecosystem are considered invasive species: True. (More)
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Asked 10/15/2013 9:25:21 AM
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