Pca Exam Correct Questions & Answers(Scored A+)

12. In general, how does the amount of biodiversity in an agroecosystem compare to that of a natural, more mature ecosystem? Biodiversity level is: A. Equal among most ecosystems B. Lower in an agroecosystem than a natural system C. Higher in an agroecosystem than a natural system D. Not measureable in agroecosystems {Ans: B. Lower in an agroecosystem than a natural system}19. Some soil-applied herbicides become tightly bound and cease to function in which type of soil? A. Wet, sandy soil B. Soil with high organic matter content C. Coarse textured soil with low organic matter content D. Dry clay soil {Ans: B. Soil with high organic matter content}37. Pest resistant cultivars that are transgenic are created by: A. Transferring genetic material from one organism into another using laboratory techniques B. Using pesticide proteins into hybrid plants which were created with sexual selection C. Culturing plant cells on agar and then breeding them with other organisms D. All of the above {Ans: A. Transferring genetic material from one organism into another using laboratory techniques}23. Arthropoda is a phylum of invertebrates which includes A. Insects, spiders, nematodes and snails B. Insects, symphylans, termites, slugs and snails C. Insects,