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Across
2.lampreys kill what kind of fish?
6.__________is more likely if an ecosystem is similar to the one in which the potential invader evolved.
7.hogs can weigh as much as _____________ pounds
9.Another name for introduced species is ___________ species
11.one of the worst introduced species
12.parasitic fish that resemble eels
13.newest technology for managing invaders is ____________ management
14.introduced species are a greater threat than pollution, harvest, and _________ combined.
16.A sort of damage these species cause
18.Starling, a _________ bird that was introduced to America
19.A way of contolling introduced species
20.a feral animal
Down
1.a vigorous and spreading plant
3.Of all 1,880 imperiled species in the United States, ____________ percent are endangered
4.An example of mechanical control is to cut ________ trees
5.a bird with agressive behaviour, introduced to America
8.The introduction of a new species has ________ impacts on their areas biodiversity.
10.Invasive species are a major _________ to our environment
15.Introduced species reduce _________ values
17.escaped from domestication and returned, partly or wholly, to a wild state

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