__ 1. corn (maize) 
__ 2. durum wheat 
__ 3. bread wheat 
__ 4. best cotton varieties (or species) 
__ 5. domestic rice 


Key

A. 2n or diploid 
B. 4n or tetraploid 
C. 6n or hexaploid

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6. An important addition to rice paddies that generally increases production is: (A) diatoms, (B) Rorippa, water cress, (C) Azolla, water fern, (D) Rafflesia. 

7. Units found in grass spikelets but not in the florets are: (A) lemmas, (B) paleas, (C) stamens, (D) glumes, (E) awns or beards. 

8. According to Klein, which area produces most of our durum wheat: (A) California, (B) Texas, (C) Kansas, (D) Washington, (E) North Dakota, (F) Pennsylvania.

9. Milled, polished white rice consists almost entirely of: (A) bran, (B) germ, (C) endosperm, (D) embryo, (E) lemma. 

10. The original home of the sugar beet was: (A) Germany, (B) Iran, (C) Iraq, (D) China, (E) Turkey, (F) Egypt, (G) Hawaii, (H) Brazil.

11. Teosinte is related most closely to: (A) durum wheat, (B) bread wheat, (C) rice, (D) corn, (E) sorghum, (F) sugar cane, (G) sugar beet.

12. Wheat germ is technically: (A) seed wall, (B) fruit wall, (C) endosperm, (D) embryo, (E) micro-organism (bacterium) always associated with wheat. 

13. The most important wheat grown in eastern U. S. was developed at: (A) Little Rock,  AR, (B) Orlando, FL, (C) Quincy, FL, (D) Athens, GA, (E) Nashville, TN, (F) Chicago. 

14. Which term most correctly describes the reproductive system for corn: (A) bisexual, (B) monoecious, (C) dioecious, (D) absent. 

15. Flour for pasta and spaghetti comes from which form of wheat: (A) emmer, (B) einkorn, (C) spelt, (D) triticale, (E) durum, (F) goatgrass, (G) teosinte.