The Biological Importance of Water for Living Organisms Water is made up of two elements‚ 2 positively charged hydrogen molecules and one negatively charged oxygen molecule. Water molecules have uneven charge distribution as one end of the molecule is slightly positive and the other slightly negative‚ this is called polar. Ionic substances such as sodium chloride dissolve easily in water because the positively and negatively charged ions are separated due to the dipole nature of water. As water
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III. Procedure A. Daily Routine Greetings Prayer Classroom Management Attendance B. Motivation “Who among you class know the song Bahay Kubo?” “Okay Let us sing Bahay Kubo. Bahay Kubo ready sing .” “Okay once again‚ 1‚ 2‚ 3 Bahay kubo ready sing .” “Okay class very good! . Now get your papers and write all the plants in the song bahay kubo .” (After some minute) “Okay class finished or not finish‚ pass your papers forward.” C. Presentation Introduction “Okay class what
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Onda‚ Kristal H. TTH 8:30-10:00 am BSAC3 BIOLOGY 1. How plants grow and develop? Just as humans have essential needs for survival‚ all plants require several basic elements to grow and thrive‚ including… Soil minerals (the more nutrient-rich the soil‚ the better the plant will grow) Water Air (carbon dioxide‚ hydrogen and oxygen) Sunlight Proper soil temperature Proper air temperature How much a plant needs of each element initially depends on the plant’s original habitat. For example
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N10/4/BIOLO/HPM/ENG/TZ0/XX 88106001 Biology HigHer level PaPer 1 Tuesday 2 November 2010 (afternoon) 1 hour INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 8810-6001 17 pages © International Baccalaureate Organization 2010 – 2 – 1. N10/4/BIOLO/HPM/ENG/TZ0/XX [Question and image
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Process of Diffusion and its importance in living organisms Diffusion is the movement of molecules or ions down a concentration gradient i.e. from an area of high concentration to an area of low concentration. For a diffusion system to be efficient‚ it should have a large surface area so that high amount of substances can be exchanged at a time. It should also have a thin membrane and a continuous supply of substances‚ as a thin membrane means that the diffusion pathway would be short‚ and the continuous
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Botany online 1996-2004. No further update‚ only historical document of botanical science! Gibberellins In 1926 studied the Japanese E. KUROSAWA a rice disease that is known as the ‘foolish seedling’-disease in Japan. The plants grow extremely fast‚ look spindly and pale and break off easily. KUROSAWA detected that the reason for this abnormal growth is a substance that is secreted by a parasitic fungi (Fusarium moniliforme = Gibberella fujikuroi). It was termed gibberellin. During the thirties
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other. A lichen is a symbiotic relationship between a fungus and a single celled alga‚ while mycorrhiza is a symbiotic relationship between a fungus and a vascular plant root 12. Non vascular plant: plants without xylem or phloem a. Vascular plant: seed bearing plants with phloem and xylem 13. Eudicot: vascular‚ flower parts in 2s‚ 4s or 5s; netted
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longitudinal wrinkles with rootlet scars. Internally‚ a ample numbers of cork cells‚ phelloderm (more than 6 layers) with lignified stone cells filled with dark reddish-brown matter‚ starch grains‚ mucilaginous matter‚ yellow oil cells (in cortex phloem)‚ xylem parenchyma‚ pericycle include stone cells of narrow lumen.
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The phloem consists of living cells arranged end to end. Unlike xylem‚ phloem vessels contain cytoplasm‚ and this goes through holes from one cell to the next. Phloem transports sucrose and amino acids up and down the plant. This is called translocation. In general‚ this happens between where these substances are made
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The Biological Structure of Water Water is a substance with the chemical formula H2O: one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. Its structure enables it to carry out many important functions in the body. Water molecules are charged‚ with the oxygen atom being slightly negative and the hydrogen atoms being slightly positive. These opposite charges attract each other‚ forming hydrogen bonds. These are weak‚ long distance bonds that are very common and
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