Lab Design “Investigate the effect of a factor on the number of stomata of a leaf.” Research Question: How do differing leaf heights affect the number/density of stomata of a leaf? Hypothesis Stomata are pores‚ typically found under the leaf (lower epidermis)‚ that control the gas exchange of transpiration‚ where water vapor leaves the plants‚ and carbon dioxide enters. I predict that the stomatal density on high leafs is higher than on low leafs. During photosynthesis the chloroplasts
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distribution density of stomata in the upper and lower epidermis of a dicotyledonous leaf. Stomata are the principle means of gas exchange in plants. Stomata are small pores they are controlled by guard cells which control the opening and closing of stomata. Stomata allow carbon dioxide to enter the plant‚ and allow water and excess oxygen to escape. About 90% of water is lost from the leaf during transpiration. The number of stomata on leaf surface varies among different species. The lower epidermis tends
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Role of Stomata & Control Stomata : a pore found in the epidermis of plants which are used to control as exchange Main function of stomata : Allow enough C02 to enter the leaf to optimize photosynthesis‚ while conserving as much water as possible Structure of stomata * Each stomata consists of a stoma (minute pore) which are surrounded by 2 guard cells. * Stomata closes and opens according to the turgidity of the guard cells * Stomata also allows for cooling of the leaf by loss
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prepare a temporary mount of a leaf peel to show stomata. B) Materials required :- Fresh leaves of plant‚ compound microscope‚ glass slides‚ cover slips‚ water‚ glycerine‚ safranine‚ blotting paper‚ needles‚ brush etc. C) Theory :- i) Stomata are minute pore present on the surface of the leaves. ii) Though they are found on both the upper and lower epidermis of the leaf‚ they are more in number on the lower epidermis. iii) Each stoma has two bean shaped
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Number of Stomata amongst Three Different Life Stages of Leaves Introduction Stomata control a tradeoff for the plant: they allow carbon dioxide in‚ but they also let precious water escape. A plant that could get enough carbon dioxide with fewer stomata would have an advantage since it would be better able to conserve its water. Levels of carbon dioxide in Earth’s atmosphere change over time — so at times when the atmosphere is carbon-dioxide-rich‚ plants can get away with having fewer stomata since
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MM Hypothesis – A Critique The assumptions of MM hypothesis are unrealistic and untenable in practice. As a result‚ the conclusions that dividend payment and other methods of financing exactly offset each other and hence‚ the irrelevance of dividends‚ is not a practical proposition; it is of merely theoretical relevance. The validity of MM approach is open to question on two counts: 1. Imperfection of Capital market 2. Resolution of uncertainty Market Imperfection MM assume that capital markets
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side 30 mm. OR Construct an ellipse having major axis and minor 120 mm and 80mm respectively by half oblong and half concentric circle method. Draw rectangular parabola for length =110mm & height = 80 mm. Draw involute of pentagon ‚ side = 30 mm. OR Draw cycloid of circle having diameter 60 mm. A line PQ 80mm long inclined at 45 deg. to the H.P. and 30 deg.to the V.P. Its end ‘P’ is 10mm Above H.P. and 20mm in front of V.P. Draw its projection. The top view of a 80 mm line AB measures 50 mm. The point
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gametophyte(haploid) generation. In leaves‚ gas exchange occurs through little pores called the stomata which are present in the sporophyte generation. These small openings are light sensitive‚ so they are most commonly located on the bottom of leaves to prevent dehydration. The stomata usually open in the morning‚ and close in the night in C3 and C4 plants. Although‚ many plants species are different when you compare their stomata orientation. One of the two major groups of flowering plants(angiosperms) are monocots
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organizational and administrative activity and gains new economic and social value. Use in human resource management of new advanced approaches will allow to increase as a whole competitiveness of the enterprise in a certain sector of economy. In many countries of Western Europe and in the USA aspects of human resource management of the companies and firms got great value. Each person possesses considerable personal and labor
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Qus4. What are the assumptions of MM approach? Ans. Assumption of the MM approach The MM approach to irrelevance of dividend is based on the following assumptions: * The capital markets are perfect and the investors behave rationally. * All information is freely available to all the investors. * There is no transaction cost. * Securities are divisible and can be split into any fraction. No investor can affect the market price. * There are no taxes and no flotation cost. * The firm
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