PLANT RESPONSES TROPISM is a biological phenomenon‚ indicating growth or turning movement of a biological organism‚ usually a plant‚ in response to an environmental stimulus. In tropisms‚ this response is dependent on the direction of the species. The word tropism comes from the Greek trope ("to turn" or "to change"). Tropisms are usually named for the stimulus involved and may be either positive (towards the stimulus) or negative (away from the stimulus). Phototropism is the growth response
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type of reproduction that does not involve the union of gametes. | |two parents. | | |2. New plants are produced from seeds. |2. New individual is produced from a single parent. | Q3. Differentiate between binary fusion and budding. Draw a well-labeled diagram showing both
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Plant Hemoglobin Hemoglobin is a protein-iron compound found within the red blood cells of most vertebrates and is responsible for the cell’s red pigment. These red blood cells carries oxygen from the lungs to the rest of the tissue cells throughout the rest of the body. Just as hemoglobin transports oxygen in humans‚ they have also been found transporting oxygen within plants. In plants‚ there are two types of hemoglobin that can be found; symbiotic and non symbiotic. Oxygen is used
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leafy object. Trees and flowers or generally‚ they are known as plants. A very good morning to all! Today‚ I would like to enlighten everyone in this room about the benefits of plants. Why do you see them everywhere you go? How do they benefit us? Well‚ the floras are a very crucial object to this planet’s survival and all its living things. However‚ today‚ I would like to focus on the benefits if plants towards us‚ human beings. Plants provide oxygen for us‚ supply us with materials to be used on
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Plant hormones are specialized chemical substances produced by plants. They are the main internal factors controlling growth and development. Hormones are produced in one part of a plant and transported to others‚ where they are effective in very small amounts. Depending on the target tissue‚ a given hormone may have different effects. Plant hormones play an integral role in controlling the growth and development of plants. A plant hormone is generally described as an organic compound synthesized
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1 Which animal tissue is commonly known as packaging tissue? 1 2. Calculate the formula unit mass of CaCO3 (given at masses: Ca = 40. 0µ‚ c=12 0µ‚ 0 = 16.0µ . determines ‘pitch’ of sound. 1 5. How does the speed of sound change on increasing the temperature? 1 6.What do you mean by photoperiod? Name two processes that are dependent on photoperiod. 2 7. What will happen if: i) The skin epithelium
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deforestation keeps on happening? I strongly believe that we need to stop deforestation before it is too late‚ or else we‚ humans‚ will suffer a lot from it. It has been told that forests are our world lungs. As many of us have known‚ every green plant can do photosynthesis‚ a process of producing oxygen from carbon dioxide. If deforestation keeps on happening‚ our oxygen supply will also deplete. That’s one thing I can guarantee. It means that we won’t have enough air to breathe with and it will
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ENDOPHYTES: ARE TROPICAL LEAVES BIODIVERSITY HOTSPOTS? A. ELIZABETH ARNOLD1 AND F. LUTZONI Department of Biology‚ Duke University‚ Durham‚ North Carolina 27708 USA Abstract. Fungal endophytes are found in asymptomatic photosynthetic tissues of all major lineages of land plants. The ubiquity of these cryptic symbionts is clear‚ but the scale of their diversity‚ host range‚ and geographic distributions are unknown. To explore the putative hyperdiversity of tropical leaf endophytes‚ we compared endophyte
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Animal Physiology Friday January 13‚ 2012 What are Animals? Invertebrates No spinal column Vertebrates Spinal column Major Animal Phyla Porifera Cnidaria Platyhel-minths Mollusca Annileda Nematoda Arthro-poda Echino-dermata Chordata What is Animal Physiology? What is Physiology? “The study of how animals work” (function) Knut Schmidt-Nielsen (1915–2007) – came up with the whole scheme of animal physiology from cell to whole organism temperature
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The primary xylem and primary phloem tissues are pushed inward into the] pith and outwards respectively by the continuous production of secondary tissues cut I off by the cambium ring. The primary xylem is gradually pushed inward and is found at the centre of the axis; whereas‚ the primary phloem‚ being soft in nature‚ gets completely crushed. These activities in the stelar region exert a great pressure outwardly. The cortex cells‚ the pericycle and the epidermis divide anticlinally to cope
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