Communication‚ Homeostasis & Energy Communication & Homeostasis Outline the need for communication systems within multicellular organisms‚ with reference to the need to respond to changes in the internal and external environment and to co-ordinate the activities of different organs. Organisms need to respond to external stimuli‚ e.g. temperature‚ oxygen concentration and levels of sunlight. These may be over time‚ e.g. winter fur to summer fur‚ or quickly‚ e.g. changing size of pupils. Internal
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stage‚ base Protein‚ peptide bond‚ simple sugar‚ polysaccharide‚ lipid‚ adipose tissue Biuret reagent‚ iodine‚ Benedict’s reagent‚ Sudan IV‚ spot test Positive control‚ negative control Eukaryote‚ prokaryote‚ yeast‚ budding‚ cilia‚ pseudopod‚ chloroplast‚ nucleus‚ cytoplasmic streaming‚ chromoplast‚
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From ancient history to the present day the Earth and its living organisms have been evolving. Four billion years ago the Earth was home to life. Starting in the Archean Era to the most current era‚ which is the Cenozoic era in which humans live. One turning point of Earth’s history occurred when the Kotuikan Cliffs shifted towards the Artic Ocean. Also‚ when observing rocks paleontologists were able to see a stunning diversity in living organisms‚ this time period was known as the Cambrain
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Yeasty beasties-The effect of reaction rate on yeast fermentation 22. Suck It Up: Capillary Action of Water in Plants- dye in water with white carnations 23. What Color Are the Leaves Really Turning? colors of fall by separating plant pigments with paper chromatography 24. Attack of the Killer Cabbage Clones. How do you clone a plant 25. Can Water Plants Be Used to Determine Water Quality? 26. Are There Bugs Under Your Feet?- numbering the microorganisms in your own yard http://www.all-science-fair-projects
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level * 2 3 0 8 9 6 9 9 7 3 * BIOLOGY Paper 5 Planning‚ Analysis and Evaluation Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black ink. You may use a pencil for any diagrams‚ graphs or rough working. Do not use staples‚ paper clips‚ highlighters
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to make sugar. The process of photosynthesis takes place in the chloroplasts‚ specifically using chlorophyll‚ the green pigment involved in photosynthesis. ------------------------------------------------- http://biology.clc.uc.edu/courses/bio104/photosyn.htm ------------------------------------------------- 2- Chloroplasts: are organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis. Chloroplasts capture light energy‚ store it in the energy storage molecules
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SCIENCE CELL – STRUCTURE AND FUNCTIONS Cell – Structure and Functions Cell as the Basic Unit of Life The cell is the basic structural and functional unit of all living organisms. It is the smallest part of the body of an organism‚ is capable of independent existence and is able to perform the essential functions of life. Discovery of the Cell Robert Hooke observed cork cells under a simple microscope designed by him. He observed compartments resembling honeycombs and each compartment
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Biology- cell organelles assignment Animal cells: Introduction: An animal cell is called a eukaryotic cell; it has a cell membrane‚ cytoplasm and a nucleus. The cell surface is covered by a membrane only. The cell membrane is strong and keeps the cell together even though it is thin and flexible. The cell membrane also controls what goes in and out of the cell e.g. nutrients go in and waste comes out. The cytoplasm is inside the nucleus and it controls the cells activities. An animal is
Free Cell Endoplasmic reticulum Organelle
This process takes place in chloroplasts‚ which is a plastid that contains chlorophyll and involves two interlinked reactions‚ which are light dependent reactions and light independent reactions. Throughout our lab experiment‚ we focused on the affect access of light has on carbon dioxide during photosynthesis. Carbon dioxide levels decrease as oxygen levels increase and glucose is produced when light dependent reactions occur. Light energy is absorbed by photo pigments and is used to raise a electron
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cell wall * Store starch * Give rise to terrestrial plants a) Desmids- uni c (bananas) b) Spirogyra- filamentous; green strands c) Chlamydomonas- biflagellated; stigma d) Volvox- colonial alga; biflagellated e) Euglena- chloroplast| Algae: Stigma; 1 flagellum; pellicle| Proto: cystostome 4. Baccillariophyta / Diatoms * Cell wall: pectin and silica * Planktonic * Produces DOMOIC ACID * Sediments; diatomaceous earth 5. Dinophyta / Dinoflagellates
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