Hort 100 Exam 2 - Fall 1988: Greenhouse Effect, Conservation, Plant Growth, Exams of Gardening and Horticulture

Download Hort 100 Exam 2 - Fall 1988: Greenhouse Effect, Conservation, Plant Growth and more Exams Gardening and Horticulture in PDF only on Docsity! Hort 100 - Exam 2 - Fall 1988 Name ____________________ Answer each question correctly, leave no blanks, if necessary you can offer written explanations for your choice of an answer. Write your answer near its respective question. I. Multiple Choice, choose the best answer, circle the letter corresponding to that answer, and write that letter in the space provided (2 points each). _____ 1. The greenhouse effect is the result of a) ultraviolet rays being trapped within the confines of the greenhouse, b) the entrance of infrared light rays through the glass, c) the loss of energy by various visible light rays within the greenhouse resulting in the buildup of low energy rays, d) failure to open the vents, e) none of the these. _____ 2. Which of these hormone types is probably responsible for the polarity observed in cuttings and grafting? a) gibberellins, b) cytokinins, c) ethylene, d) dormins, e) auxins, f) other (specify) _______________________________. ____ 3. The hyacinth is an example of a (an) a) apple, b) bulb, c) corn, d) corm, e) spur. _____ 4. If you planted a single dwarf 'Red Delicious' apple tree at your home, you may notice that you get little or no fruit set even after it flowered heavily. Your cherry tree, which is planted near the apple tree, flowers and fruits well each year. What is wrong? a) bees did not visit your tree, b) you have a dioecious plant, c) your tree was accidently sprayed with herbicide, d) your plant is juvenile, e) you need a pollinizer. _____ 5. Ericaceous plants such as the cranberry and azalea require this type of soil, a) pasteurized, b) basic, c) sandy, d) acidic, e) clay loam. _____ 6. The contractile root of a crocus is unique in that it a) pushes the crocus upward through the soil toward sunlight, b) pulls it downward to the proper soil depth, c) frequently has seizures which cause small earthquakes, d) draws the root system closer to water and nutrients, e) has a white stripe down its midvein. _____ 7. The basic principle of soil and water conservation is a) to minimize the absorption of water into the soil, b) the faster that wind or water moves across the soil the more soil and/or water that it can carry, c) to cover the soil with mulch d) to avoid overgrowth of weeds, e) to retard wind movement. _____ 8. When a plant is dormant due to physiological factors, the plant is said to be a) hibernating, b) quiescent, c) dormant, d) in rest, e) senescent, f) none of these. _____ 9. A strawberry with a "Black eye" a) is dormant, b) is infected by fungus, c) slipped while running, d) tried to propagate sexually, e) has suffered frost damage f) should be covered with straw immediately. _____ 10. This plant grows and flowers well in cool greenhouses a) cyclamen, b) rose, c) snapdragon, d) asparagus, e) chrysanthemum. _____ 11. What is a Malling 9? a) a new Mall in Chicago, b) a wrestling hold, c) golf course jargon, d) a dwarfing rootstock for peach, e) an airplane, f) a greenhouse watering device, g) other (specify) __________________________. _____ 12. Which of the following is not a cation? a) NH4, b) K, c) Na d) NO3, e) Ca, f) Mg. _____ 13. Where do slips come from? a) you buy them in a lingerie department, b) they arise adventitiously from sweet potato roots, c) they arise from eyes of sweet potato, d) misplaced banana peels, e) from pre-formed buds. _____ 14. If you took a leaf section from a carnation and placed the disk on tissue culture medium, which of the following growth regulator combinations would most favor the differentiation of adventitious roots? a) high auxin, low cytokinin, b) low auxin, high cytokinin, c) low auxin, low cytokinin, d) high auxin, high cytokinin, e) any of the above, f) none of these. _____ 15. Which of these growth regulator combinations would most favor shoot development from the isolated leaf disk mentioned above (#14)? a) high auxin, low cytokinin, b) low auxin, high cytokinin, c) low auxin, low cytokinin, d) high auxin, high cytokinin, e) any of the above, f) none of these. _____ 16. The texture of a soil is described by its a) relative quantities of sand, silt, clay, and organic matter, b) relative proportions of organic and inorganic matter, c) ability to be worked by equipment, d) its relative proportions of sand, silt, and clay, e) the amount of humus in the soil, f) all of the above, g) none of the above. _____ 17. When a plant begins to develop reddish purple spots on its foliage, it may be suffering from deficiency of this element. a) Fe, b) K, c) N, d) P, e) Ca. _____ 18. Pure steam is "cooled" to pasteurization temperatures a) by the addition of water, b) by air conditioning, c) mixture with sand, d) mixing it with air, e) other (specify) ________________. _____ 19. Double fertilization results in a) 2n zygote and 3n endosperm, b) extra long styles like on corn, c) polyembryony, d) apomixis, e) 3n zygote and 2n endosperm, f) two or more seeds. _____ 20. A starter solution is a) high in phosphorous, b) useful for transplants, c) low in potassium, d) all of the above, e) none of the above, f) is useful on cold winter mornings. _____ 21. How many nuclei are found in the egg sac? a) 1, b) 2, c) 3, d) 4, e) 5, f) 6, g) 7, h) 8, i) 9, j) 10, k) 11, l) 12. _____ 22. In general, incandescent bulbs a) emit light high in red light and low in infrared, b) emit light low in ultraviolet but high in blue, c) emit light high in blue light but low in red, d) emit light low in blue light but high in red, e) are a new type of glow in the dark plant developed through genetic engineering, f) none of the above. _____ 23. Which of the following nutrients is essential to plant growth? a) protein, b) carbohydrates, c) cellulose, d) amino acids, e) fats, f) all of the above, g) none of the above. _____ 24. Green manure comes from a) St. Patrick's day festivities, b) sick cows, c) crunchy frogs, d) plowed under living crops, e) legumes only, f) substantially increases the inorganic matter of the soil, g) none of these. _____ 25. Plants propagated by cuttings a) must be watered by a mist to prevent desiccation; b) suffer excessively from the cold; c) are seldom as healthy as seed propagated plants; d) all of the above; e) none of the above. _____ 26. The presence of clay in the soil is of primary interest for its a) anion exchange capacity; b) water holding capacity, c) inhibition of organic matter degradation; d) all of the above; e) none of the above.