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Darvin - SpainRecently active£14
£14I teach English, Greek and Spanish classes for children and teenagers.
Teacher with more than ten years of experience, I have lived, studied and worked in Greece, Spain and England. My experience with both languages has given me the ability to teach other people in a dynamic and professional way. I offer to learn about your goals, your level of English, Greek or Spanish and thus design personalized and direct classes so that we can achieve your goals together. My greatest satisfaction is communicating with my students in the languages I have already taught them. I teach the classes online because I also work for the cruise line. I greatly respect my students and their goals, but I always make it clear that mutual respect, mutual schedules, and mutual commitment are the only three points that I try to have in common with my students, since those points reflect that we are going to meet our goals. I love to bring up topics about almost everything, doing pronunciation exercises. I truly believe that if we use what we do throughout the day to create an increasingly extensive vocabulary and we are persistent, I think that in a short time we can achieve very good results. I am a specialist in breaking the ice and creating the best closeness or complicity to get the most out of my dear students, I assure you that learning English, Greek and Spanish will be fun and one of the best experiences you will have!!!
English
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Fatiha - Dellys, AlgeriaRecently active£11
£11General definition of cell, cell structure, the difference between prokaryotic and eukaryotic cell
The cell, the fundamental unit of all living beings, is a complex structure composed of different elements working in harmony. The plasma membrane: the protective envelope The plasma membrane is a semi-permeable barrier that delimits the cell and separates it from its environment. It consists of a double layer of phospholipids, in which various proteins are integrated. These proteins play a crucial role in the transport of substances across the membrane, cell communication and cell recognition. The cytoplasm: the internal environment The cytoplasm is the aqueous medium inside the cell. It contains many organelles, inclusions, and the cytosol. The cytosol is the liquid part of the cytoplasm, rich in enzymes and molecules necessary for the chemical reactions of the cell. The Core: The Control Center The nucleus is a characteristic organelle of eukaryotic cells. It contains the genetic information of the cell in the form of DNA, organized into chromosomes. The nucleus is surrounded by a nuclear envelope pierced by nuclear pores that allow the exchange of molecules between the nucleus and the cytoplasm. Organelles: specialized factories Organelles are specialized structures present in the cytoplasm. Each of them fulfills a specific function: Mitochondria: Nicknamed the "power plants" of the cell, they are the seat of cellular respiration, a process that produces the energy needed by the cell. The endoplasmic reticulum: A network of membranes involved in the synthesis of proteins and lipids. The Golgi apparatus: A set of flattened sacs that modify, package, and distribute proteins and lipids synthesized by the endoplasmic reticulum. Lysosomes: Small vesicles containing digestive enzymes that break down unnecessary or damaged molecules. The cytoskeleton: the skeleton of the cell The cytoskeleton is a network of protein filaments that gives the cell its shape, allows it to move, and organizes its organelles. It is made up of three types of filaments: microfilaments, intermediate filaments, and microtubules. The differences between prokaryotic and eukaryotic cells There are two main types of cells: prokaryotic cells (bacteria) and eukaryotic cells (animals, plants, fungi). Prokaryotic cells are simpler and do not have a nucleus or membrane-bound organelles. Eukaryotic cells, on the other hand, are more complex and have a nucleus and many organelles.
Biology
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