water‚ glycerine‚ safranine‚ blotting paper‚ needles‚ brush etc. C) Theory :- i) Stomata are minutepore 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 cellscalled guard cells surrounded by epidermal cells. iv) Each guard cell hasa nucleus and a number of chloroplasts. The inner wall of the guard cell is thicker
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purpose of this experiment was to show that osmosis of water thru plant stomata does not require energy (ATP). Materials and methods: In order to test the hypothesis‚ epidermis from the Zebrina plant was removed with a razor into 4 pieces and was placed in Petri dishes. Tweezers were then used to place each epidermis onto one of four slides. Each of the four slides contained different solutions: Distilled Water‚ Sucrose‚ DNP‚ and Sucrose plus DNP. Cover slips were then used to place over
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test the sensitivity of Staphylococcus epidermis of specific areas on a petri dish. The antibiotics were gentamicin‚ novobiacin‚ and penicillin. This resembled a culture and sensitivity test that is preformed at the hospital’s laboratory to find out the resistance of a microorganism. This experiment was meant to use the naked eye and a magnifying glass when necessary. Procedures: This experiment called for prepared agar in a petri dish‚ smeared s. epidermis on the surface of the prepared agar‚ and
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Latent Fingerprint: Methods of Collection In 1892‚ Francisca Rojas was found with intense neck injuries while her two sons were found with their throats cut open and dead. Francisca Rojas fanatically accused her neighbor who‚ under extreme interrogation‚ would not confess of committing murder and injuring Rojas’s neck. Inspector Alvarez‚ the head of the case‚ went to the crime scene and found a bloody fingerprint next to where the boys laid. After comparing the fingerprint to those of the neighbor
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Stem Cells and Tissue Renewal 1 The Multicellular “Habitat” • Cells of multicellular organisms – highly specialized – over 200 types in human body • Arranged into tissues‚ organs‚ organ systems • Unable to survive outside body “habitat” skin wont survive in heart tissues. They all start up identicals 2 Specialized Cell Types • Cells of early embryo identical • Differentiation results in specialized cell types – some differentiated cells continue to divide – many others are
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functions are centered at the fibro vascular system that is composed of two major tissues‚ the xylem and the phloem. Internal Parts of Woody Stems 1. Protective layers In a young plant‚ the protective covering is the epidermis but then as the plant matures‚ the epidermis is sloughed off and will be replaced by the cells that originate from the cork cambium or phellogen. This produces a layer of cork cells which are suberized‚ thus almost impermeable to air or water. But‚ there are small areas
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is the skin and burns damage the skin. More than ten thousand burn victims die a year from infection. There are six different degrees of burns. A first degree burn damages the outer layers of skin called the epidermis. A second degree burn damages the layers of skin under the epidermis called the dermis. Third degree burns damage both layers and possibly the muscle‚ tendons‚ fat‚ and bones. Fourth degree burns damage everything all the way to the bone. Fifth and sixth degree burns are usually
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different types of skin cancers: Melanomas and non-melanomas. To understand both of these terms a little better you need to be aware that your skin is divided up into 3 layers: the epidermis‚ dermis‚ and subcutis. The top layer‚ the epidermis‚ is very thin and serves to protect the deeper layers of the skin. The epidermis is also composed of basal cells‚ which in turn divide to form squamous cells and melanocytes. Melanoma skin cancer develops from the melanocytes and non-melanomas skin cancer develops
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than one layer of skin on a species. A toad’s (bufo marinus) Integumentary system consists of a thin‚ moist skin. The skin has two layers‚ an outer epidermis and an inner dermis. The state of QLD environmental protection agency (2007) discusses that there is also a thin exterior cuticle layer that the animal regularly sheds and eats. The epidermis is covered with large exocrine glands that excrete mucus which then spreads around the surface of the skin giving it further protection. Cane toads also
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develops from the skin’s basal cells. The basal cells are located in the outermost layer of the skin called the epidermis and can be found in the deepest layer of the epidermis [1]. Basal cells constantly divide to form new cells in order to replace the squamous cells. As basal cells move up in the epidermis‚ the basal cells flatten and eventually become simple squamous cells. Separating the epidermis from deeper layers of the skin‚ the basement membrane is a barrier‚ which can be used as a protective mechanism
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