| Term | Definition |
|---|
| coevolution | Species in food webs have evolved together so that they are dependent on the presence of each other |
| food web | each species relies on the success of another; producers, primary consumers (herbivores) , higher level consumers (carnivores) |
| gypsy moth | were first introduced to the U.S. in the 1860's when they were brought from Asia to Massachusetts to be used in silk manufacturing |
| concern about gypsy moth | Since the gypsy moth did not coevolve with the oak trees, the oaks had no natural resistance to them and the result was massive damage to oak forests throughout the |
| killer bees | Bee keepers in Brazil intended to cross European honeybees with African honeybees, intending to produce a bee that was docile but produced more honey. African queens escaped and hybridized |
| origination of fire ants | arrived in the U.S. on a boat from South America in the 1930's. They have since migrated across the southern U.S. Despite all attempts made so far, the federal government has been unable to eradicate them. |
| phorid fly | parasitizes fire ants |
| continental drift | Over 200 million years ago, the continents were combined into one large landmass. About 65 million years ago, the continents began arriving in their current positions. The communities of organisms on each continent have co-evolved during these years. |
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