Exam+4+2004 - BIOLOGY 1720/1722 FINAL EXAM, MAY, 2004...

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Please read each question carefully and choose THE BEST answer. Please choose only ONE answer (a,b,c,d, or e). Please complete the exam in the time allotted (50 minutes). 1. The phytochrome system activates certain plant growth responses, such as germination, when: a. Pr is rapidly converted to Pfr b. Pfr is rapidly converted to Pr c. Pr and Pfr are equally stimulated by far-red and red light, respectively d. far-red light is absorbed by Pfr e. photosynthetic production of ATP powers phytochrome conversion 2. Of what significance is a flower? a. it is a structure unique to the vascular plants b. it facilitates events in gamete formation and fusion c. it aids in the dispersal of seeds d. it marks the completion of sexual reproduction e. it provides food for the developing embryo 3. Which of the following plant hormones is INCORRECTLY paired with its function? a. auxin – promotes stem growth through cell elongation b. cytokinin – initiates senescence c. gibberellin – stimulates seed and bud germination d. abscisic acid – promotes seed and bud dormancy e. ethylene – inhibits cell elongation 4. Which of the following is INCORRECTLY paired with the proper life- cycle generation? a. anther – sporophyte b. petals and sepals – sporophyte c. ovary – gametophyte d. pollen grain – gametophyte e. pro-embryo – sporophyte 5. Which is the most common type of spatial distribution of individuals in a population: a. logistic b. uniform c. random d. exponential e. clumped 6. Apomixis is to embryo formation as: a. leaves are to fruits b. monoecious plants are to perfect flowers c. double fertilization is to pollination d. runners are to genetic diversification e. callus culture is to clonal plants 7. Which of the following is NOT part of the acid-growth hypothesis? a. auxin stimulates proton pumps in cell membranes b. lowered pH activates enzymes in the cell walls c. pH-sensitive enzymes break cross-links between cellulose microfibrils d. auxin-activated proton pumps stimulate cell division in meristems e. the turgor pressure of the cell exceeds the restraining pressure of the loosened cell wall, and the cell takes up water and elongates 8. Plant regeneration, an important component of plant transformation, relies upon the manipulation of two hormones: a. cytokinin, to promote the formation of roots, and auxin, to promote the formation of shoots b. auxin, to promote root formation, and cytokinin, to promote shoot formation c. auxin, to promote root formation, and abscisic acid, to promote shoot formation d. ethylene, to promote abscission of untransformed tissues, and auxin, to promote shoot formation e. brassinosteroids, to promote rapid cell division and expansion, and gibberellic acid, to promote stem elongation 9. Placing an under-ripe banana in a plastic bag with an apple will cause the banana to quickly ripen because the apple produces which hormone? a.
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This note was uploaded on 09/16/2008 for the course BIOL 1720 taught by Professor Jagadeeswaran during the Spring '08 term at North Texas.

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Exam+4+2004 - BIOLOGY 1720/1722 FINAL EXAM, MAY, 2004...

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