The first property of water is that it is an excellent solvent. This is because of the chemical composition and physical attributes of water. Since water is polar‚ it allows water molecules to become attracted to different molecules. The attraction can be so powerful that it can disrupt the attractive forces of the different molecules. For example‚ water can be heavily attracted to salt that it can disrupt the forces that hold sodium and chloride‚ therefore dissolving it. The second property of water
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evolved morphological‚ anatomical and physiological adaptations to obtain‚ process‚ transport and store raw materials and energy under varying conditions. capture and conversion of radiant energy to chemical energy takes place in chloroplasts (chloroplasts are localized in specialized tissues) products of photosynthesis are used in respiration‚ growth‚ repair‚ maintenance‚ storage. energy consuming reactions must take place for the substances of photosynthesis to be transported around the plant
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Mastering Concepts 2.1 1. Which chemical elements do organisms require in large amounts? Carbon‚ oxygen‚ hydrogen‚ nitrogen‚ sulfur‚ and phosphorus are the chemical elements that organisms require in large amounts. 2. Where in an atom are protons‚ neutrons‚ and electrons located? An atom’s protons and neutrons are in its nucleus. A cloud of electrons surrounds the nucleus. 3. What does an element’s atomic number indicate? An atom’s atomic number indicates the number of protons in its nucleus
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from overheating or freezing. Absorbency The ability to take in a material Adhesion The tendency of water to stick to other substances Buoyancy The ability of a fluid to exert an upward force on an object that is immersed in the fluid Capillary Action The process that moves water through a narrow porous space (cohesion helps the transfer of water up through fibers of plants) Needed for plants to survive Cohesion The attractive force between water molecules or the tendency of water molecule
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water and mineral via symplastic route continues and ended in xylem vessels. Keong BP Water and mineral are now ready for upward transport into the shoot system. Keong BP 2. Transport of Water and Minerals into Xylem. Cohesion of water molecules and adhesion of water molecules with hydrophilic walls of xylem cells assists in movement of sap from down to upward in the stem. Keong BP 1. Bulk Flow Transport via Xylem. The air in these spaces is saturated with water vapour‚ that is
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Describe the pathways AND mechanisms by which water passes from the soil to the xylem vessels in the root. (7 marks) As there is a higher water potential in the soil‚ and there is a lower water potential in the root hair cells‚ the water molecules move from the area of high potential to the area of low potential. From the soil into the roots. The process by which the molecules of water move into the root hair cells is ’osmosis’. This is a passive process‚ meaning that no energy (in the form of
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Amanda Bynes 2.1 assessment p.5 pg. 38 October 1st 1a. Describe the structure of an atom -Proton‚ neutron‚ electron 1b. An atom of calcium contains 20 protons. How many electrons does it have? -20 2b. Compare the structure of carbon-12 and carbon-13 -Carbon-12 has 6 protons‚ 6 electrons and 6 neutrons. Carbon-14 has 6 protons‚ 6 electrons and 8 neutrons. 4a. What are two types of bonds that hold the atoms within a compound together?
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water molecule? What kind of bond holds different water molecules together? Understand how to balance a chemical equation Define hydrogen bond Describe how hydrogen bonding contributes to water’s cohesive ability Describe adhesion Describe how cohesion‚ surface tension‚ and adhesion contribute to the capillary action which moves water through plants Define heat Is heat energy potential or kinetic? Define temperature Define specific heat and describe why water’s high specific heat is important to life
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fattened blade‚ a stalk and a petiole. They have the chloroplast (with chlorophyll) and the gas exchange takes place here. 2.) Intra-organism communication is possible through the xylem and the phloem. The transpiratinal pull is due to cohesion and adhesion. Evaporative cooling will result. A plant’s defense is due to its skin: the epidermis or periderm. Another line of defense is a chemical attack that kills pathogens. This is enhanced by the inherited ability to recognize certain pathogens
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especially compared to hydrogen; thus for an oxygen-hydrogen bond: B. The polar character of water allows water molecules to form many (up to 4) hydrogen bonds. II. What properties of water are important for life? A. Cohesion of water molecules 1. Cohesion: e.g.: 2. Adhesion: e.g.: 3. Surface tension: B. Ability to moderate temperature 1. The unusual specific heat of water leads to temperature stability specific heat – High specific heat of water à temp. stability 2. 3. Evaporative
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