PATTERNS IN NATURE QUESTIONS 1) State the cell theory 2) Outline the contributions of Robert Hooke and Robert Brown plus several others 3) Discuss how these developments helped to advance the cell theory Robert Brown’s microscope Robert Hooke’s microscope Transmission electron microscope Modern light microscope Scanning electron microscope 4) Describe evidence to support the cell theory 5) Discuss the significance of technological advances to developments
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Xylem tubes can be up to 1 metre in length. Xylems give support‚ strength and rigidity to the stem. Water that enters the xylem in the roots is transported upwards through the stem to the leaves‚ which is a process also known as transpiration. The phloem transport sugars to the whole of the plant. Sugars are made in leaves of the plant during photosynthesis. Sugars that are transported to other cells can be used as food to provide energy for the cell. The process of breaking down sugars to create
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A mitochondrion (Terminologia histologica: Mitochondrion) is a cell organelle of eucaryotes with ovoid shape that is the major source for intracellular energy. Mitochondria are present in all but mature red blood cells. They can migrate through the cytoplasm and change their shape. These organelles have an outer unit membrane (membrana mitochondrialis externa) and an inner membrane (membrana mitochondrialis interna). The latter has protrusions into the matrix (mitochondrial plasma). Depending on
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QUILONA‚ KLARISSE JANE A. BSP-1B Animal Tissues 1. Epithelial Epithelial tissue is made of closely-packed cells arranged in flat sheets. Epithelia form the surface of the skin‚ line the various cavities and tubes of the body‚ and cover the internal organs. Subsets of Epithelia Epithelia that form the interface between the internal and external environments. Skin as well as the lining of the mouth and nasal cavity. These are derived from ectoderm. Inner lining of the GI tract‚ lungs‚ urinary
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young. These monosaccharides also help to build disaccharides. Glucose and fructose join together to form sucrose and glucose and lactose join to form galactose. Sucrose is the major transport carbohydrate of green plants. It is transported in the phloem by translocation. It is formed in the leaves by photosynthesis. The Calvin cycle (the light independent reactions) which takes place in the stroma produces glucose‚ which in turn is changed into sucrose. Complex carbohydrates (polysaccharides) are
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family that aphids. It takes part from the genera Phenacoccus and from the order Hemiptera. B] Biology and Description of cassava mealybug The Phenacoccus manihoti is an oligophagous mealybug which feeds principally of phloem sap of manioc. The cassava mealybug is a jackhammer sucking insect of the same family of the aphid. In fact‚ it uses the same host plant detection behavior than aphids and can detect a possible host plant thanks to its smell and sight. Then‚ it can
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The tablet that was left whole had an average dissolving time of 5minites 12 seconds‚ the halves had an average of 4 minutes 13 seconds ‚ the thirds was an average of 4minutes 2 seconds and the last tablet‚ the quarters has the shortest time of 3 minutes 38 seconds My experiment was repeated three times‚ i did this as it helps to improve the reliability of my test. The test was as accurate as possible but of course no test is performed perfectly‚ there are always errors that occur and errors that
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® keep it simple science Copying is permitted according to the Site Licence Conditions only HSC Biology Topic 1 MAINTAINING A BALANCE What is this topic about? To keep it as simple as possible‚ (K.I.S.S.) this topic involves the study of: 1. ENZYMES & HOMEOSTASIS 2. TEMPERATURE REGULATION 3. INTERNAL TRANSPORT SYSTEMS 4. EXCRETION & WATER BALANCE but first‚ an introduction... Living Things are Made of Cells Homeostasis All living things are composed of microscopic units
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are adaptations to photosynthesis. Use clearly labelled diagrams in your answers. Water‚ air and glucose must move around the leave for it to photosynthesise. The water is transported through the xylem while the glucose is transported through the phloem. The epidermis allows the sunlight to readily penetrate through the leave for photosynthesis. 8) Explain the difference between mechanical and chemical digestion. Mechanical digestion is the actual physical break down of food into smaller pieces;
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OH H α-glucose Disaccharide (made of 2 monosaccharides joined together) Polysaccharide (made of many monosaccharides joined together) maltose = α-glucose + α-glucose sucrose = glucose + fructose lactose = glucose + galactose germinating seeds phloem tissue‚ fruit milk β-glucose fructose O maltose starch glycogen cellulose chitin = = = = polymer of glucose polymer of α-glucose polymer of β-glucose polymer of glucosamine (glucose with an amino acid attached) chloroplast stroma muscle
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