the distribution of tissues in the stem and leaf of a dicotyledonous plant. Cross-section of a stem Part of plant | Purpose | Epidermis | Surface of the stem made of a number of layers often with a waxy cuticle to reduce water loss | Cortex Tissue | Forming a cylinder of tissue around the outer edge of the stem. Often contains cells with secondary thickening in the cell walls which provides additional support | Vascular bundle | contains xylem‚ phloem and cambium tissue | Xylem | a longitudinal
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Effect of an Orange on Catalase Activity in Comparison with a Potato Introduction Catalysts are substances that increase chemical reactions while using less energy. They also remain unchanged after use‚ which enables it to be used repeatedly. Cells have special catalysts called enzymes‚ which are specialized proteins that help accelerate chemical cell reactions. (Evert‚ RF & Eichhorn‚ SE 2013). Enzymes also control plant metabolic processes such as respiration (Evert RF‚ Eichhorn SE & Perry JB
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(the part we eat) grows underground and thus‚ is not exposed to sunlight. Photosynthesis requires the presence of sunlight‚ so chloroplasts are useless. Procedure 4.7 What is a plastid? Organelles where food is made and stored. Why are potato amyloplasts dark purple after staining with
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pollen grain * Vascular bundles distributed around tissue of stem * Fibrous roots * Leaf structure * Very thin for max surface area for photosynthesis * Cuticle: Outermost layer that protects leaf from drying out * Epidermis: Next layer composed of multiple layers used to protect against water loss‚ regulate gas exchange‚ and secrete metabolic compounds * Mesophyll: Tissue that comprises
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Project: Agricultural Science Name: Ciara Murphy Farm: Rathconrath Co. Westmeath Livestock: Breed of Cow: On my farm the farmer bred British Friesian Cattle. Friesian cattle are a breed of cattle known today as the world’s highest production dairy animal. Originating in Europe Friesian’s were bred it what is now called the Netherlands. The farmer chose British Friesian over any other breed as he finds they are a more dual-purpose cow. This means the cow produces good milk and also has
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From the table it was found that the calcium oxalate content in fresh tuber were 0.14% in elephant foot yam‚ in karunai kizhangu 0.25% and in taro 0.20 percent respectively. The processed (soaking the tubers in citric acid followed by blanching‚ drying & roasting) tuber flour was subjected to determine the presence of calcium oxalate. It was found that elephant foot yam flour had 0.05%‚ karunai kizhangu flour contained 0.09% and in taro flour had 0.08 percent calcium oxalate. The reduction in acridity
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Experiment 1 Background Diffusion is a process‚ in relation to the spontaneous movement of molecules from an area of high concentration‚ to an area of low concentration down a concentration gradient. It is a type of passive transport method‚ that requires no cellular energy (ATP). This movement occurs‚ until a state of equilibrium has been established on both sides of the membrane. The diffusion of molecules happens at cellular level‚ through a cell membrane via the pores. The cell membrane
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types of vegetative reproduction : * Runners / stolons * Rhizomes * Corms * Bulbs * Leaves * Suckers * Stem tubers * Stem * RUNNERS / STOLONS Runners are stems which grow horizontally over the surface of the ground. Shoots and roots of the young plant grow from the nodes of the runners. Example : strawberry plant‚ sweet potato‚ grass‚ Indian pennywort (pegaga). * RHIZOMES A rhizomes is a horizontal underground storage stem which scale leaves and buds
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Experiment 2 : Transport Across Membrane Name : Matrix No : Group : B Semester : 1 Date of Experiment : 05.09.2013 Lecturer’s Name : Miss OBJECTIVE To study the effects of hypotonic‚ hypertonic and isotonic solutions on plant and animal cells. INTRODUCTION In cellular biology the term membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes‚ which are lipid bilayers
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destroyed. If kept at too low a temperature the enzyme is deactivated but not destroyed. Catalase is complementary to hydrogen peroxide and breaks it down into water and oxygen. The enzyme Catalase is found in the body in a number of organs and tissues. This includes the liver where the job of the enzyme is to decompose hydrogen peroxide into oxygen and water. It is necessary for the Catalase to break down the
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