All plants have stoma to help regulate how much water is taken and released along with the other chemicals involved. Stomatal density is the number of stomata per unit area of a leaf. The experiment conducted with leaves along a water source and away from a water source was to analyze the stomatal density difference. This experiment was performed to measure which environment had a greater effect on stomatal density. Stomata of a leaf is a miniature pore in the epidermis of a leaf surrounded by guard
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Death in the open In the essay “Death in the Open” Lewis Thomas talks about the dead animals he finds on the side of the road and how he feels about such death. Life is about leaving an impression in one way or another. Death is a reflection on what a person has done in the world. Thomas’ feelings towards death is sadness and anger because of the way he reacts towards dead animals on the side of the road‚ how he feels about life as a whole is a positive feeling‚ and how he thinks animals deal with
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Study guide for exam 2. Chapter 7 ‐ Membrane Structure and Function Define fluid mosaic model semi‐permeability amphipathic molecules What is the effect of unsaturated fatty acids on membrane structure and properties? What is the effect of cholesterol on membrane structure and properties? Membrane Proteins and Their Functions peripheral Integral proteins Classification based on function (transport‚ enzymatic activity‚ cell‐cell interactions‚ etc.) How do proteins get to cell surface
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phototropism‚ already discussed‚ plants have multiple ways that they can change their stimulus-response due to dehydration. Plants with only limited access to water may experience changes such as growing leaves with smaller surface area (less area for photosynthesis‚ but also less area for water loss)‚ dropping of the larger lower leaves‚ and may also experience direct root growth into deeper soil for an increased water supply. Information about knowing where their predators would also be important as it
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An ecosystem is a biological environment consisting of all the organisms living in a particular area‚ as well as all the nonliving or abiotic‚ physical components of the environment with which the organisms interact‚ such as air‚ soil‚ water and sunlight. In a typical ecosystem‚ plants and other photosynthetic organisms are the producers that provide the food. (Leibold) Ecosystems can be permanent or temporary and they usually form a number of food webs. Examples of ecosystem include: Marine Ecosystems:
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POND LIFE IN A CONTROLLED ENVIRONMENT Indroduction-Materials-Methods-Results-Discussion-Conclusion-Literature.Cited-Reference.Copies-Data Perrie Alderton 12-10-2013 BIO 101 Jade Woodcock Introduction “A Pond is commonly described by limnologists as a quiet body of water so shallow that rooted plants grow completely across it. Its water temperature is fairly uniform from the top to bottom and tends to change with air temperature. There
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thirteenth leaf is directly above the first allowing an increased sunlight increase. * Roots: Pineapples have auxiliary roots that form on the leaf axis of the plant. This allows for direct water and nutrients absorption by the plant. * Photosynthesis: The Plant goes through a
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Without this process the other half would not have anything to combine with to complete the DNA required to create a new cell. This would mean that reproduction of a new cell would not occur and the whole process would not be possible. Part 2: Photosynthesis and Cellular Respiration Matrix Complete the matrix. Use the following questions to aid in completion: • What is the purpose of this pathway? • Reactants: What does this reaction need to proceed? • Products: What is produced because
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Planktons: groups of tiny floating organisms that cannot swim against the current. *Taxonomy: size‚ function‚ autotrophs-producers‚ heterotrophs-consumers/decomposers‚ mixotrophs‚ complex‚ symbiotic/parasitic *Small to big: femtoplankton (viruses)‚ pico (bacteria)‚ nano (diatoms‚ dinoflagellates)‚ micro(sameasnano+protozoa)‚ meso(mostly zooplankton)‚ macroplankton *Grazing food chain: Phyto->zooplk->fish *Sinking flux: dead fall to deeper ocean POM: Particulate organic material DOM:
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2011 PRELIMINARY EXAMINATION PAPER Senior Science General Instructions * Reading Time – 5 minutes * Working Time – 2 hours * Write using black or blue pen * Draw diagrams using pencil * Board-approved calculators may be used * Write your Student Number at the bottom of this page | Total Marks - 75 Section I Pages 2–1675 marksThis section has two parts‚ Part A and Part BPart A – 20 marks * Attempt Questions 1–20 * Allow
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