INFECTION An infection is the colonization of a hostorganism by parasitespecies. Infecting parasites seek to use the host’s resources to reproduce‚ often resulting in disease. Colloquially‚ infections are usually considered to be caused by microscopic organisms or microparasites like viruses‚ prions‚ bacteria‚ and viroids‚ though larger organisms like macroparasites and fungi can also infect. Hosts normally fight infections themselves via their immune system. Mammalian hosts react to infections
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2 Y Nutrition in Animals food into simpler substances is called digestion. You have studied in Class VI that food consists of many components. Try to recall and list them below: 1. ______________________ 2. ______________________ 3. ______________________ 4. ______________________ 5. ______________________ 6. ______________________ no t The components of food such as carbohydrates are complex substances. These complex substances cannot be utilised as such. So they are broken down into
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Observing the Characteristics of Life In this activity‚ you’ll identify some observable characteristics (some not) of life in videos of various organisms and describe those characteristics. Review Remember that ALL living organisms are made up of CELLS! What are seven characteristics of living things? 1. Movement 2. Reproduction 3. Sensitivity 4. Growth 5. Respiration 6. Nutrients 7. Excretion If your teacher is displaying the
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FIVE KINGDOM CLASSIFICATION Biological System of Classification • Organisms are first divided into a few kingdoms • Phylum or division is made up of several classes • Classes are made up of orders • Within each order there is a family • Each family consists of a varying number of genus • A genus usually has several species. Organisms within the species can breed PROCARYOTAE KINGDOM Prokaryote • Also called as bacteria‚ these as believed to be the most abundant
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Water testing is carried out for ions‚ colour‚ pH‚ hardness‚ turbidity‚ conductivity‚ micro-organisms. Alternative methods of filtration such as membrane filtration may be both more efficient in removing particles including microorganisms such as Giardia and Cryptosporidium. However‚ these techniques are expensive to execute. Monitoring of catchment and treatment processes is necessary. If microbial levels are too great extra chlorine can be added‚ if organic matter is excessive‚ aeration of the
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Microbiology Study Guide Chapters 1-6 Chapter 1 Main Themes of Microbiology Microorganisms Most are not Pathogens Prokaryotic-no nucleus or organelles Very simplistic—like bacteria Eukaryotic-has nucleus and organelles like mitochondria Includes fungus‚ and animals Acellular-not even a complete cell Includes viruses and prions like those that cause Mad Cow disease Six main types of microorganisms Bacterium (prokaryotic) Fungus (eukaryotic) Algae (eukaryotic) Virus (acellular)
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The Observation of organism in a drop of pond water (Paramecium) under LPO and HPO Compound Microscope Doreenda A. Sabao BS Biology I-A .Lab 1 August 01‚ 2013 INTODUCTION A pond is a body of freshwater smaller than a lake. Ponds are naturally formed by a depression in the ground filling and retaining water. Streams or spring water is usually fed into these bodies. They can also be man-made ponds which can be created by damming a stream‚ digging a hole. Ponds are usually
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states that some of the organelles in today’s eukaryotic cells were once prokaryotic bacteria. In this theory‚ the first eukaryotic cell was probably an amoeba-like nucleated (probably DNA in a nucleoid region not an actual nucleus) prokaryotic cell that got nutrients by phagocytosis (engulfing nutrients or other cells) Some of these unicellular amoeba-like organisms engulfed prokaryotic cells that somehow were not digested within the organism. In the process of being engulfed the smaller cells would
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SCIENCE CLASS – IX SAMPLE PAPER SA – 1 General Instructions: MM: 90 The question paper comprises of two sections‚ A and B. You are to attempt both the sections. i) All questions are compulsory. ii) There is no overall choice. However‚ internal choice has been provided in all the five questions of five marks category. Only one option in such questions is to be attempted. iii) All questions of Section A and all questions of Section B are to be attempted separately. iv) Question numbers 1 to
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The euglena uses its whip-like "tail" to move. It flicks the tail and that propels it around. 6. The paramecium uses its cilia to move around randomly. 7. The amoeba uses its pseudo pod (false foot) to move around. 8. I do not know if the protists I saw were free living or parasitic. 9. The white blood cells in our body are like an amoeba. 10. 11. Drinking water is kept free of protists by filters and chlorine. 12. a) Red tide is red algal blooms that affect shellfish‚ making them bad too eat
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