Syllabus topic: Cell structure Aim: To observe and draw transverse sections of parenchyma‚ collenchyma‚ sclerenchyma‚ xylem‚ phloem and epidermal cells using a light microscope. Apparatus and Materials: Light microscope; microscopic slide of dicotyledonous stem Method: 1. The light microscope was plugged into a power source‚ and switched on. 2. The coarse focus of the light microscope was adjusted with both hands to move the stage downwards. 3. The slide with the dicotyledonous stem
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Eukaryotes are organisms whose cells are organized into complex structures by internal membranes and a cytoskeleton. The most characteristic membrane bound structure is the nucleus. This feature gives them their name‚ (also spelled "eucaryote‚") which comes from the Greek word referring to the nucleus. Animals‚ plants‚ fungi‚ and protists are eukaryotes. Microorganisms and all other living organisms are classified as prokaryotes or eukaryotes. Prokaryotes and eukaryotes are distinguished on the
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| C. | stretching it | | D. | making it sperical (Correct Answer) | | E. | all of the above (Your Answer) | Incorrect | | | Q.3) | Members of the domains Bacteria and Archaea: | | | | A. | have nuclei | | B. | have chloroplasts | | C. | are multicellular (Your Answer) | | D. | are prokaryotes (Correct Answer) | | E. | have flagella | Incorrect | | | Q.4) | Which of the following is not a characteristic of a prokaryotic cell? | | | | A. | A
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Unit 10: Biological Molecules and Metabolic Pathways C: Explore the factors that can affect the pathways and the rate of photosynthesis in plants The following report is about the factors which can affect the pathways and the the rate of photosynthesis in plants. This report will cover what photosynthesis is ‚ the factors which may affect photosynthesis in working poorly‚ light independant and dependant reaction. An investigation will be carried out which will include the factors that affect photosynthesis
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Cell Membrane and Organelle Webquest Name Yamani Woody Using the websites listed‚ answer the following questions. Website #1: http://www.usd.edu/~bgoodman/Membrane.htm http://www.biologymad.com/cells/cellmembrane.htm 1. What invention came along that enabled us to better see the cell membrane? Electron Microscope 2. What are the two parts (list the first two listed) of the cell membrane? Phospholipids and proteins 3. What is one of the cell membrane’s jobs? It controls how substances can
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peptidoglycan. Specialized cell to cell communication pathways known as plasmodesmata‚ pores in the primary cell wall through which the plasmalemma and endoplasmic reticulum of adjacent cells are continuous. Plastids‚ the most notable being the chloroplasts‚ which contain chlorophyll a green coloured pigment which is used for absorbing sunlight and is used by a plant to make its own food in the process is known as photosynthesis. Other types of plastid are the amyloplasts‚ specialized for starch storage
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and storage of calcium ions. Because the mitochondrion has its own DNA‚ theory suggests that the mitochondrion has a prokaryotic history. The endosymbiotic theory proposes that the mitochondria originated as a prokaryotic organism along with the chloroplast—an organelle that conducts photosynthesis‚ evolved from bacteria. Both of these organelles were taken in by the cell as endosymbionts. Ivan Wallin introduced the idea of the mitochondrion having a prokaryotic ancestry in the 1920s (Jarvis par. 2)
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Chapter 3 Cell Function and Structure Wonder Drug j What You Will Be Learning 3.1 How Penicillin Was Discovered 3.2 Cell Theory: All Living Things Are Made of Cells 3.3 Membranes: All Cells Have Them 3.4 Prokaryotic and Eukaryotic Cells Have Different Structures 3.5 Some Antibiotics Target Bacterial Cell Walls 3.6 Some Antibiotics Inhibit Prokaryotic Ribosomes 3.7 Molecules Move across the Cell Membrane 3.8 Eukaryotic Cells Have Organelles UP CLOSE Eukaryotic Organelles
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Biology Study Term 1 Organic Compounds: Water- Provides an environment for metabolic reactions The structure gives it a slightly positive and slightly negative charge giving it the ability to dissolve substances. Carbohydrates: The main function of carbohydrates is to provide an energy source Carbohydrates can also be used for structural units such a deoxyribose. Composed of Carbon‚ Oxygen and Hydrogen. Monosaccharaides: Composed of 3 to 7 carbons. Prefixes indicate the number of
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Photosynthesis is a process done in the chloroplasts of plant cells that is beneficial to all of life. Plants are able to convert light to energy which is beneficial to the plants‚ while also giving off oxygen as a byproduct for humans. Chloroplasts are in the thylakoid discs of a plant cell‚ that contain chlorophyll a and chlorophyll b‚ which are it’s light-capturing pigments. Colors in the wavelengths are either absorbed or reflected by the chlorophyll in which case green is reflected and colors
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