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TEXT C
What makes for a successful invasion Often, the answer is to have better weapons than the enemy. And, as it is with people, so it is with plants—at least, that is the conclusion of a paper published in Biology Letters by Naomi Cappueeino, of Carleton University, and Thor Arnason, of the University of Ottawa, both in Canada.
The phenomenon of alien species popping up unexpected parts of the world has grown over the past few decades as people and goods become more mobile and plant seeds and animal larvae have hitched along for the ride. Most such aliens blend into the ecosystem in which they arrive without too much fuss. (Indeed, many probably fail to establish themselves at all—but those failures, of course, are never noticed.) Occasionally, though,
something goes bananas and starts ttarts to take the place over, and an invasive species is born. Dr. Cappuceino and Dr. Arnason asked themselves why.
One hypo
A. plant seeds are resistant to antibiotics.
B. people tend to hitch a ride.
C. there are more circulation of goods.
D. animal larvae become stronger.