General Information Practical Work Assessment Guide Table of Summary of Experiments Determination of osmotic potential Use of microscope‚ magnification‚ and measurement of cell size Observation of cells (a) animal cell: cheek cell (b) plant cell: leaf epidermis cell Enzyme activity Separation of photosynthetic pigments using paper chromatography Examining slides of transverse sections of C3 and C4 leaves Use of yeast in respiratory experiment Dissection of the mammalian digestive system Dissection
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this experiment we used paper chromatography to determine the amount of chlorophyll a‚ chlorophyll b‚ xanthophyll‚ and beta-carotene in a tube of blended leaf extract. We recorded our findings on the table labeled table 1. Table 1 shows the transmittance at each wavelength on a table from 400 to 720. The information on Figure 1 came from the leaf extract on the paper chromatography that we used; with the help of acetone we saw the spectrum and the differences of the different pigments. Percentage
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Introduction Transpiration is a process which is similar to the evaporation. Water is lost at the surface of the plant such as leaves‚ stems‚ roots and flowers in the form of water vapor. It creates a pulling. Force which causes continuous upward movement of water and mineral salts and this force is called transpiration pull. Apart from to water‚ gas like carbon dioxides from the air can also pass through by the pore of the surface of the plants for photosynthesis. But in this experiment‚ we
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Mauritius and East Asia but is not regarded as invasive in those places. It grows mostly in shady areas‚ under trees or shrubs. Mimosa pudica is well known for its rapid plant movement. Like a number of other plant species‚ it undergoes changes in leaf orientation termed "sleep" or nyctinastic movement. The foliage closes during darkness and reopens in light.[4]The leaves also close under various other stimuli‚ such as touching‚ warming‚ blowing‚ or shaking. These types of movements have been termed
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light intensity does have an effect on the size of the stomata. 5. In the dicot leaves‚ the stomata are widely spread across the leaves; whereas‚ in the monocot leaves‚ the stomata are arranged parallel and linear to each other. In the monocots‚ the leaf venation is parallel; hence leading to
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humidity. JUSTIFICATION: The light would allow photosynthesis to occur and the stomata to open but little if any diffusion of water out the leaf would occur. HYPOTHESIS 3: Plants transpire the least when it is dark and there is lots of humidity. JUSTIFICATION: Photosynthesis does not occur without light and the humidity prevents water from diffusing out the leaf. RESULTS: [pic] DISCUSSION: Our class data showed that the transpiration pull was the second highest in humidity and in the dark.
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as new leafs sprout‚ so while deciduous‚ the tree is not without leaves for long. Tiny flowers are followed by four to five"‚ woody fruits that burst open to expel the seeds. Mahogany is a valuable hardwood and this tree was once extensively harvested for its wood. Batac City‚ Ilocos Norte‚ has numerous mahogany trees planted throughout the city for this purpose. The termites are a group of eusocial insects. Termites mostly feed on dead plant material‚ generally in the form of wood‚ leaf litter
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Abscisic Acid and Stomatal Closure Abscisic acid is a single compound unlike the auxins‚ gibberellins‚ and cytokinins. It was called "abscisin II" originally because it was thought to play a major role in abscission of fruits. Though ABA generally is thought to play mostly inhibitory roles‚ it has many promoting functions as well. In 1963‚ abscisic acid was first identified and characterized by Frederick Addicott and his associates. They were studying compounds responsible for the abscission
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Kalachuchi Plumiera rubra TEMPLE FLOWER‚ FRANGIPANI Other scientific names Common names Plumiera acuminata Kachuchi (C. Bis.) Plumiera alba Kalachuche (Tag.‚ Bik.) Kalasusi (Tag.) Kalatsutsi (Tag.) Kalanuche (Ilk.) Kalonoche (Ilk.) Karachucha (Tag.) Karatuche (Tag.) Frangipani (Engl.) Temple flower (Engl.) Botany · Small tree‚ 3 to 7 m high‚ stem smooth and shining‚ succulent‚ with abundant white latex; easily breaks. · Leaves: crowded at the terminal end
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dependent and independent phytochrome signal transduction pathways. Cell 73‚ 937-952. Raven‚ P.‚ Evert‚ R.‚ and Eichhorn‚ S. (2005). Biology of Plants. W.H. Freeman and Company Publishers: USA. Satter‚ R.‚ and Galston‚ A. (1981). Mechanisms of Control of Leaf Movements. Annual Review of Plant Physiology 32‚ 83-110.
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