1. In which way do Asian carp compete with native fishes? Select


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27.50

1. In which way do Asian carp compete with native fishes? Select one: a. by exploiting nesting sitesb. by chasing small fish from their territoryc. by consuming large quatities of phytoplanktond. by eating Zebra mussels, the base of the food chain 2. One danger of the widespread adoption by farmers of crop varieties genetically engineered to resist herbicides is that: Select one: a. resistant weeds are selected by repeated use of a single herbicide.b. crop varieties have to be re-engineered every year to maintain resistance.c. farmers will keep seeds and reduce profit margins of seed companies.d. farmers will have to increase herbicide dosages to kill the weeds. 3. The effectiveness of DDT in agriculture allowed growers to: Select one: a. raise crops through the winter months.b. raise vegetables without the need for pollinators.c. eliminate irrigation in fields where it had been used previously.d. raise more productive crops for a number of years. 4. Which of the following is a goal that has been reached by the use of biotechnology? Select one: a. New products have broken our dependence on pesticide use in agriculture. b. Biotechnology in developing countries is affordable. c. Crop plants have been made with resistance to some diseases. d. Gene flow between crops and weeds has been successful. 5. Among the top concerns associated with the Bt gene is: Select one: a. development of more herbicide resistant corn.b. increased biodiversity of corn.c. complete eradication of the European corn borer.d. genetic contamination of wild varieties of non-GM corn individuals. 6. Which is an example of a cultural ecosytem service? Select one: a. educationb. nutrient cyclingc. climate regulationd. wood and fiber 7. Two types of barriers were mentioned in the lecture. What are two barriers to invasive species? (Select the two that apply.) Select one or more: a. quarantine b. electrical barrierc. biologicald. chemical 8. Why has the Bt gene been inserted into several crop plants? Select one: a. It gives the plant resistance to a viral disease.b. It increases the nutritional value of the crop.c. It makes the crop herbicide-resistant.d. It kills the caterpillars that eat the crop. 9. Which is NOT a type of trait altered by genetic engineering? Select one: a. time of ripeningb. herbicide resistance c. pest resistanced. early flowering 10. Which of the following terms does NOT apply to invasive species? Select one: a. native to the ecosystem under considerationb. introducedc. human commensald. domestic

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