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18th INTERNATIONAL BIOLOGY OLYMPIAD JULY 15 - 22, 2007 PRACTICAL EXAMINATION 2 PLANT ANATOMY, MORPHOLOGY AND PHYSIOLOGY EXAM BOOKLET 1 TASK A. Identification of plant structures and organs 16 marks Time allowed: 20 minutes WRITE YOUR 4-DIGIT STUDENT NUMBER IN THE BOX BELOW STUDENT CODE Plant Biology Lab Exam, Booklet 1 STUDENT CODE _____________________ 2 PLANT MORPHOLOGY TASK A. Identification of plant structures and organs from images shown in a PowerPoint presentation (16 marks) In this task, you are required to answer the following questions, each of which relates to a slide that you will be shown. Each slide will be shown twice. In the first showing, each slide will be displayed for 45 seconds, then the second slide will be shown for 45 seconds and so on until all 16 slides have been once. The second showing is to give you the opportunity to review your answers. In this showing, each slide will be displayed for 15 seconds. FOR EACH QUESTION, WRITE THE LETTER OF YOUR ANSWER IN THE SPACE PROVIDED 1. Which of the following terms describes the mutualistic relationship between roots of land plants and specific soil fungi. a. mycorrhizae b. mycelium c. Mesozoic d. root hairs ANSWER: _________________ 2. Reticulate veination is commonly found in which group of plants? a. hornworts b. dicotyledons c. ferns d. monocotyledons e. gymnosperms ANSWER: __________________ 3. Aerenchyma stem tissue in the dicot Potamogeton, is characteristic of its adaptation as a: a) mesophyte b) xerophyte c) halophyte d) hydrophyte ANSWER: __________________ Plant Biology Lab Exam, Booklet 1 STUDENT CODE ___________________ 4. What type of angiosperm do these leaf cross-sections represent? a) b) c) d) a monocot a lycopod a eudicot a tree e) a shrub 5. ANSWER: __________________ In this picture of a fern sorus, what is the ploidy level of the structure indicated by the arrow? a) triploid b) diploid c) haploid ANSWER: __________________ 6. In this longitudinal section of a dicot angiosperm stem, name the structure indicated by ‘X’. a) shoot apical meristem b) axillary bud c) lateral inflorescence d) lateral root e) leaf primordium ANSWER: __________________ 7. The arrow in this slide is indicating: a) sclerenchyma fibre b) sieve tube element c) vessel element d) chlorenchyma e) sclerid ANSWER: __________________ 8. The arrow is indicating a bundle cap of sclerenchyma fibres. Which of the following function(s) might these fibres be performing? a) b) c) d) to prevent an insect proboscis reaching phloem sap to provide mechanical support to the xylem tissue to initiate the formation of interfascicular vascular cambium all of the above e) none of the above ANSWER: __________________ 3 Plant Biology Lab Exam, Booklet 1 STUDENT CODE _____________________ 9. The name of the meristem responsible for generating the tissues labelled ‘X’ is a) b) c) d) vascular cambium shoot apical meristem root apical meristem cork cambium e) lenticel ANSWER: __________________ 10. The presence of which of the following cells gives Pyrus communis L. (pears) their gritty texture? a) chlorenchyma b) guard cell c) tracheary element d) collenchyma e) sclerid ANSWER: __________________ 11. This type of phyllotaxy is best described as: a) whorled b) distichous c) opposite d) alternate e) typical ANSWER: __________________ 12. The hormone auxin, produced at the terminal meristem, inhibits lateral shoot growth which results in a phenomenon known as a) conical shape b) deciduousness c) apical dominance d) axillary dominance ANSWER: __________________ 13. These tendrils and spines represent evolutionary modifications of what structures? a) leaves b) branches c) axillary shoots d) adventitious roots e) trichomes ANSWER: __________________ 4 Plant Biology Lab Exam, Booklet 1 STUDENT CODE ___________________ 5 14. Which of the following plant cell types has the potential to give rise to all the other cells in the list? a) b) c) d) parenchyma companion collenchyma sclerid ANSWER: __________________ e) tracheary element 15. In embryo development, the structure indicated by the arrow is known as the a) filament b) endosperm c) heart-shaped embryo d) suspensor ANSWER: __________________ e) basal cell 16. This slide shows an example of a plant group in which the sporophytic phase of its life cycle is dependent on the gametophyte. Which is this plant group? a) angiosperms b) bryophytes c) tracheophytes ANSWER: __________________ d) pteridophytes - THE END – HAVE YOU WRITTEN YOUR STUDENT NUMBER ON THE FIRST PAGE OF THIS EXAM BOOKLET AND ON THE TOP OF EVERY OTHER PAGE?