Atlantic ctenophores in the Sea of Azov and the kudzu vine overgrowing a forest in southern Alabama
A) have become invasive species that threaten native species in their new environments.
B) have become naturalized and live in equilibrium with native species.
C) demonstrate how species can rapidly spread to new environments on their own.
D) have small populations that probably will not survive more than a year or two.
Question 2
Invasive species are dangerous because
A) they are almost all predators, disturbing ecological relationships by eating other species.
B) they carry viruses that spread disease in new ecosystems.
C) the native species have not evolved with and adapted to these organisms.
D) they tend to be secretive, going unnoticed in their new ecosystems.
Tropical rain forest in Fiji
English Colonies on the Atlantic Seaboard
Southern rockhopper penguin
Walker Evans, Roadside Stand near Birmingham, Alabama.
Forest and Trees around the world