reservoirs: atmosphere‚ oceans‚ lakes‚ rivers‚ soils‚ glaciers‚ snowfields‚ and groundwater. Water moves from one reservoir to another by way of processes like evaporation‚ condensation‚ precipitation‚ deposition‚ runoff‚ infiltration‚ sublimation‚ transpiration‚ melting‚ and groundwater flow. The oceans supply most of the evaporated water found in the atmosphere (“The Water Cycle.”). Of this evaporated water‚ only 91% of it is returned to the ocean basins by way of precipitation. The remaining 9% is transported
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hairs (via osmosis & root pressure) Move through cortex into xylem (small xylem vessels) via symplastic loading (movement through cell) & apoplastic loading (movement through cell wall) Water movement up xylem by capillarity Stomata controls transpiration allowing water to leave xylem into leaf water in leaves Mesophyll cells – cells in leaves specialised for photosynthesis. Walls are moist – air spaces around them contain water. Gases enter & leave leaf through stomata – when sun shines‚
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Plant Physiology Review for Quiz 4/09/13 1. What is Plant Physiology? Plant physiology is the study of the functions of plants. 2. What is the difference between phenotype and genotype The difference between phenotype and genotype is that phenotype is the external characteristics and genotype is the genetic make up 3. What are the two types of cell walls? The two types of cell walls are primary cell wall and secondary cell wall. 4. What are the most abundance components of the CELL
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Surname Centre No. Candidate No. Paper Reference(s) Initial(s) Paper Reference Signature 7 0 4 0 7040/02 0 2 Examiner’s use only London Examinations GCE Biology Ordinary Level Paper 2 Friday 18 January 2008 – Afternoon Time: 2 hours Team Leader’s use only Question Leave Number Blank 1 2 3 4 5 Materials required for examination Nil Items included with question papers Nil 6 7 8 Instructions to Candidates In the boxes above‚ write your centre number‚ candidate
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(e.g.‚ K+‚ Ca2+) travel dissolved in the water (often accompanied by various organic molecules supplied by root cells).Less than 1% of the water reaching the leaves is used in photosynthesis and plant growth. Most of it is lost in transpiration. However‚ transpiration does serve two useful functions: * It provides the force for lifting the water up the stems. * It cools the leaves. Water and minerals enter the root by separate paths which eventually converge
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w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level .c rs om *0485738200* BIOLOGY Paper 2 Structured Questions AS Candidates answer on the Question Paper. Additional Materials: Electronic calculator Ruler (cm/mm) 9700/21 October/November 2009 1 hour 15 minutes READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name in the spaces provided at the top of this
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-How plants get liquid and minerals- Flowers absorb liquid through their roots‚ which are attached to xylem vessels. Xylem vessels are tubes that can expand through several feet of tissue and be .7mm in diameter. Their walls are thickened with cellulose deposits. Xylem bring water up to the leaves and petals of the plant. Even without contact with the roots‚ the xylem can still absorb water. Because of this‚ a cut flower usually doesn’t die for a couple days (as long as it is placed in water of
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By the end of this topic you should be able to answer the following learning outcomes: Big Idea 1 The biological processes occurring in plants Essential question(s) you should ask yourself while studying this part of the topic: What is the life cycle and structure of a plant? Understand the life cycle of a plant Describe the structure and function of parts of the plant Describe the transport of water through a plant Why are leaves‚ flowers and seeds important? Describe the process of photosynthesis
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Water lab Research Question: How many drops of water can fit on a coin? (Water properties involved are cohesion and surface tension. Cohesion plays a consequential role in the transport of water within plants specifically within the phloem. Surface tension also dictates an important role within the transpirational pull of the xylem.) Variables: Variables | Type of Variable | How it was manipulated | Independent | Water drops‚ different types of water | Determining how many drops of the
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2.2 Movement in and out Cells 1 Define diffusion Diffusion is the net movement of molecules from a region of higher concentration to a region of lower concentration down a concentration gradient‚ as a result of their random movement 2 Describe the importance of diffusion of gases and solutes and of water as a solvent. Gases Necessary for gas exchange in all living organisms Necessary for obtaining Carbon Dioxide and releasing oxygen during photosynthesis. Solutes (liquids) Dissolved salts
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