A solar cell (also called photovoltaic cell or photoelectric cell) is a solid state electrical device that converts the energy of light directly into electricity by the photovoltaic effect. Assemblies of cells used to make solar modules which are used to capture energy from sunlight‚ are known as solar panels. The energy generated from these solar modules‚ referred to as solar power‚ is an example of solar energy. Photovoltaics is the field of technology and research related to the practical
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Chapter 5 Describe tight junctions Consist of transmembrane cell-adheasion proteins around upper part of cell holding neighboring cells together. Identify the three types of muscle tissue * Cardiac * Smooth * Skeletal A muscle cell is also called a myocyte What type of tissues covers body surfaces‚ lines body cavities‚ forms the internal and external linings of many organs and constitutes most gland tissue? Epithelial By definition‚ adipose tissue is a type of connective tissue that
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not part of meiosis. The cell undergoes different changes and transformations before and during meiosis‚ such as replication and condensation of chromosomes‚ duplication of centrosome‚ disappearance of nuclear envelope and the nucleus itself and more. During the first stage of the meiosis I homologous chromosomes line up side-by-side and form synapses. The paired chromosomes are called tetrads‚ and the chromatids of homologous chromosomes cross over at chiasmata. During prometaphase I‚ kinetochores
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Cell Organelles Nucleus Its function is to control the cell’s activities and retain the chromosomes. The nucleus is bound by a double membrane‚ the nuclear envelope. The nuclear envelope has pores in it to allow the transport of mRNA. The cytoplasm like material is called nucleoplasm which contains chromatin (coils of DNA and histone proteins)‚ it is chromatin that condenses to form chromosomes during cell division. Within the nucleus is a small spherical body called the nucleolus which
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of the Cell Overview: The Importance of Cells • All organisms are made of cells. o Many organisms are single-celled. o Even in multicellular organisms‚ the cell is the basic unit of structure and function. • The cell is the simplest collection of matter that can live. • All cells are related by their descent from earlier cells. Concept 2 Eukaryotic cells have internal membranes that compartmentalize their functions Prokaryotic and eukaryotic cells differ
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1. INTRODUCTION A solar cell is a device that converts the energy of sunlight directly into electricity by the photovoltaic effect. Sometimes the term solar cell is reserved for devices intended specifically to capture energy from sunlight‚ while the term photovoltaic cell is used when the light source is unspecified.”Photovoltaics” the field of technology and research related to the application of solar cells in producing electricity for practical use.
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roles of mitotic cell division‚ meiosis‚ and fertilization in the human life cycle. Mitosis allows for growth and repair from the fertilized egg to the adult. In reproductively mature individuals‚ meiosis creates gametes with half the genetic material. The male gamete then fertilizes the female gamete during sexual reproduction‚ forming a zygote with a full set of genetic material. 2. Why are both cell division and apoptosis necessary for the development of an organism? Cell division is needed
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Structure of Cells Monday‚ September 30‚ 2013 • Cytology ○ Cyto = cell ○ Logos = study of • Background ○ 1665 Robert Hook’s Micrographia § Was studying cork cells ○ 1833 R. Brown § Discovered nucleus ○ 1838 M. Schleiden § Said that all plants consist of cells ○ 1839 T. Schwann § All animals consist of cells ○ 1855 Virchow § Cells come only from preexisting cells • The Cell Theory ○ Cells are the structural units of all living things ○ Cells are
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Cell Specialisation All cells are designed to perform a particular job within an organism‚ that is‚ to sustain life. Cells can become specialized to perform a particular function within an organism‚ usually as part of a larger tissue consisting of many of the same cells working together for example muscle cells. The cells combine together for a common purpose. All organisms will contain specialised cells. There are hundreds of types of specialised cells. Below is listed some of the major ones
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study of the concern performance . * Major project :project on ’SRI GARMENTS IN YARN MANAGEMENT SYSTEM’‚V L B janakiammal college of arts and science * POST GRADUATION * Mini project: Summer internship program on HRM and PRODUCTION activities at SRI DHARRN INDUSTRIES‚ Coimbatore‚ June 2011. In this summer internship program the project done on two departments HRM and
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