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Plants and Human Affairs: Questions to think about.
1. Contrast the origin and development of agriculture in the old
   and new worlds. How do you account for the differences?
2. What roles do hybridization, introgression and polyploidy play
   in the evolution of wheat?
3. Compare the ways in which natural selection has operated in
   plant evolution with the ways in which people have selected
   plants during their appearance on earth.
4. Compare the early history of the development of wheat and corn
   with respect to: a) evidence, b) locations, c) structure of
   the plant part used.
5. Describe a typical a) seedling, b) mature plant, and c) fruit
   of the Gramineae. In what respects is corn not typical?
6. Select a root or tuber crop and a grain crop and compare them
   with reference to the following: a) climate, b) soil, c)
   yield, d) nutritional value.
7. Which of the following are stems and explain how you know this
   to be the case: potato, cassava, onion, taro.
8. What is endosperm and how is it formed? Describe the changes
   that take place in wheat endosperm during germination.
9. Compare and contrast: a) beer and wine, b) sap wood and heart
   wood, c) jute and cotton, d) seed and fruit, e) multiple and
   aggregate fruit.
10. In what ways are forest ecosystems of value other than in the
    production of wood and wood products?
11. Describe how the nitrogen cycle works and what might be the
    effects of agriculture and forestry upon it?
12. Define and alkaloid. Chose two cases and describe: a) the
    compound itself, b) its distribution within the plant, c) its
    probable origin, d) its role in history.
13. What characteristics of soil important to plant growth are
    controlled by good structure? Explain how structure may be
    maintained or destroyed by cultivation proctices.
14. What are fertilizers made of? Why?
15. Contrast lateritic and podzolic soils with regard to relative
    agricultureal importance.
16. Distinguish chemically between essential oils, resins, and
    rubber. Select an example of each and give: a) a name of the
    plant which produced it, b) where the plant grows, c) the
    plant part from which the product is commercially obtained.
17. Discuss how the search for such luxuries as spices has
    affected history. What other plant products have played
    important historical roles?
18. Compare and contrast: a) black tea and green tea, b) black
    pepper, white pepper and  paprika, c) herb and spice plant.
19. What is a polyunsaturaterd fat? What is the distinction
    between an essential oil and an essential lipid?
20. Discuss three problems that illustrate how land usage
    problems are essentially plant usage problems.
21. Consider some important plant diseases and discuss ways in
    which modern agriculturists are attempting to control them.
22. What are some commercial applications of our knowledge about
    plant growth regulators.
23. What is(was?) the "Green Revolution." Is(was?) it successful?

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