1.1 Studying the Structure of Cells In 1665‚ English scientist Robert Hooke became the first person to study cells Cell Structure Nucleolus: Makes Ribosomes‚ which help to make proteins Nuclear Membrane: Protects the contents of the nucleus Nuclear Pores: Allow materials‚ such as ribosomes‚ in and out of the nucleus |Light Microscope |Electron Microscope | |Uses light source |Beams of electrons
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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 of water through transpiration to lower leaf temperature * Guard cells open and close to control
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Microbiology Term Paper of BTY(205) Topic:- Different types of Microscopes Submitted to:- Submitted by:- Annapurna S. Agasthya Anjali Kumari B-15 11007713 B.Sc. Biotechnology Acknowledgement I am heartily thankful to my teacher‚ Annapurna S. Agasthya who gave me such a wonderful topic and whose encouragement‚ guidance and support from the initial to the final level enabled me to develop an understanding
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Plant Structure and Function Plant Body The unique organization of tissues in flowering plants is part of the reason why they are the dominant group of the plant kingdom. Monocots and Dicots Meristems Meristems – region of undifferentiated cells that can divide rapidly. Apical meristems – shoots and tip of roots (primary growth) Lateral meristems – thickening of the cambium (secondary growth) Plant Tissues Plant Tissues Xylem – conducts water and mineral ions; fluids can
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skin maintenance. Facials include deep cleansing‚ exfoliation‚ moisturizing‚ mask application‚ and massage‚ are great for removing impurities‚ toning the skin‚ and producing the healthy glow of good skin. What is a facial? About the skin‚ Different Skin Types A facial is a step towards helping the skin look youthful and prevent premature ageing. Facials and Facemasks work on the skin to remove dirt‚ grime‚ and excess oil and provide a moisturizing and softening benefit at the same time. The facial
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Bacterial cells are Prokaryotic cells. These cells have several internal structures and surface structures. The cell walls are of two types‚ gram positive and gram negative. Out of all the structures‚ the two selected structures are the cell- wall and endospores. The cell- wall of bacterial cells is found in three distinct shapes such as spherical‚ spiral and rod shaped. The cell wall of the bacterial cells is composed of the proteins and polysaccharides. This is collectively called peptidoglycan
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and organizational structure is an important theme. The two can be difficult to clearly distinguish from one another‚ and even more so to clearly define within an institution. Organizational structure works within an organizational culture‚ but it is not completely separate. The two are very much intertwined. Organizational culture is more of a larger picture‚ a more general term that refers to a large umbrella of smaller topics and issues within an organization. The structure refers to the infrastructure
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Cell Membrane Structure Phospholipids are arranged in to layers‚ called the bilayer. They only have 2 fatty acids‚ this is because the third fatty acid is replaced by a negatively charged phosphate group. The phosphate heads are polar‚ in other words attracted to water‚ therefore they are hydrophilic. The lipid tails are non-popular as they’re not attracted to water and therefore known as hydrophobic. When phospholipids are added to the water‚ they rearrange themselves so that the hydrophilic heads
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CHAPTER 1 Cell Structure and Organisation Cells * All living organisms are made up of cells * The simplest living organisms have one cell only * His name is unicellular-e.g. bacteria. * Most other living organisms have many cells- his name is multicellular- e.g. Man‚ plants‚ animals. * Cells can be seen only under microscope Cell structure All cells have the following structure in common: a) Cell membrane- a very thin layer of protein and fat‚ surrounding the cell. It is
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The cells of the adaptive immune system are special types of leukocytes‚ called lymphocytes. There are two main types of lymphocytes‚ B cells and T cells‚ which are derived from hematopoietic stem cells in the bone marrow. T cells are involved in cell-mediated immune response‚ whereas B cells are involved in the humoral immune response. The surface of each lymphatic cell has receptors that enable them to recognize foreign substances. There are two major subtypes of T cells: the helper T cell and
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