Question

_____ 3. How much of the potential food harvest do pests destroy worldwide?

a. 100 percent c. 33 percent

b. 50 percent d. 10 percent



RECOGNIZING SIMILARITIES AND DIFFERENCES:

Read each question and write the answer in the space provided.



4. How does insect damage to crops in Kenya compare to insect damage to crops in North America?

a.



5. Why do crop plants have less protection from pests than wild plants?

a.





The following statements apply to either wild plants or to crop plants. In the space provided, write “WP” if the statement applies to wild plants or “CP” if the statement applies to crop plants.



_____ 6. grow throughout a landscape



_____ 7. provide pests with a one-stop source of food



_____ 8. have evolved defenses against many pests



_____ 9. are protected from pests by pest predators that live on or near the plants



_____ 10. grow together in large fields





RECOGNIZING CAUSE AND EFFECT:

Read each question and write the answer in the space provided.

Answer 1

3. c. 33 percent

4. Insect damage is much greater in Kenya than in North America. (Kenyan crops suffer higher losses because there is less pest control, fewer inputs and technologies, and more exposure to damaging insects.)

5. Crop plants have less protection because they’re bred and managed for yield and uniform traits, reducing natural defenses and genetic diversity; they’re also grown in monocultures that make them easier for pests to find and exploit.

6. WP

7. CP

8. WP

9. WP

10. CP