Acharacteristic of some organisms that are uninjured or unaffected by a certain dosage of pesticide chemical used to successfully control other populations of the same organism. also, plants and/or animals that are unaffected by a pest species

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?