Bio ( Experiment 1 )

AIM: Temporary mount of a leaf peel to show its stomata. -------------------------------------------------------------------------------1.Which of the following stain is used to see the stomata during temporary mount of a leaf peel? a. safranin

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b. methylene blue c. cotton blue d. none of these 2. Temporary mount of a peel is made in: a. alcohol b.wax c. glycerine

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d. acetone 3. Stomata are present in dicot leaves on: a. upper epidermis b. lower epidermis

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c. both of these d. none of these 4. Guard cells in monocot plants are of which shape? a. bean b. dumb bell

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c. circular d. polygonal 5. Guard cell walls have a. uniform thickening b. differential thickening

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c. angular thickening d. none of these 6. Cells are focused in microscope first in

a. 10 X b. 40X

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c.100X d. any of the above 7. Stomata generally open when guard cells are : a. turgid

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b. flaccid c. any of these d. none of these 8. The peel is generally transferred from Petri dish to the slide by : a. needle b. forceps c. brush

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d. any of the above 9. We put cover slips on the slides very gently to avoid : a. entry of air bubbles

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b. crushing of materials c. oozing of glycerine d. none of these 10.The minute apertures generally present on leaf surface are called a. guard cells b. stomata >>>>>>>>>>>>>>>> c. epidermal cells d. hydathode 11. Guard cells differ from epidermal cells in : a. shape b. dense protoplasm c. differential thickening of cell walls d. all of these

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12.Each stomatal pore is guarded by a. subsidiary cells b. epidermal cells c. guard cells

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d. trichomes 13. Guard cells are usually a. kidney shaped

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b. rectangular c. nucleus d. chloroplasts 14. The colour of guard cell is a . red b. green

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c. yellow d. no colour 15.Tick the correct statement a. stomata are always surrounded by subsidiary cells b. stomata are absent in the leaves of submerged plants

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c. stomata are absent in the leaves of free floating plants d. the guard cells are absent in some stomata. 16. Mark the odd one out a. vascular tissue

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b. guard cells c. epidermal cells d. subsidiary cells 17. More stomata are present in a. flower peel b. lower epidermis of dicot leaf c. upper epidermis of dicot leaf

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d. potato peel 18. Stomatal pore opens when a. water from surrounding cells enter into guard cells

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b. water from guard cells goes to surrounding cells c. the plants are in dark d. no movement of water between guard and surrounding cells. 19. Each stoma opens into a small a. vesicle b. sub-stomatal air chamber

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c. chamber filled with water d. haustorium 20. While preparing a temporary stained slide, the extra stain is removed by a. washing with water b. washing with calcium chloride solution c. soaking with filter paper d. absorbing with cotton wool.

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