CORE BIOLOGY PRACTICALS You will need to know these practicals as the exam board may ask you questions based on them. Below is a summary of each one. Name of practical and independent & dependent variables Effect of caffeine on Daphnia heart rate Independent: caffeine concentration Dependent: heart rate of Daphnia Measuring the content of Vitamin C in fruit juice Independent: fruit juice Dependent: volume of juice required to decolourise 1cm3 of DCPIP The effect of temperature on cell membranes
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A nutrient cycle (or ecological recycling) is the movement and exchange of organic and inorganic matter back into the production of living matter. The process is regulated by food web pathways that decompose matter into mineral nutrients. Nutrient cycles occur within ecosystems. Ecosystems are interconnected systems where matter and energy flows and is exchanged as organisms feed‚ digest‚ and migrate about. Minerals and nutrients accumulate in varied densities and uneven configurations across the
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Digestion and Nutrients Briana Smallwood The human body needs nutrients for it to survive. Nutrients are the fuel for the body to do work. It helps the body grow‚ provide protection from sickness and disease‚ function properly‚ and even live. There are many types and forms of nutrients that each do specific or multiple jobs. They are classified in six main groups. Carbohydrates‚ proteins‚ fats‚ vitamins‚ minerals and water are all the different groups. Proteins are nutrients that help build and
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Plant Tissue Culture 151 Chapter 9 Plant Tissue Culture Techniques Lorraine Mineo Department of Biology Lafayette College Easton‚ Pennsylvania 18042 Lorraine Buzas Mineo (B.S.‚ Muhlenberg College; M.A.‚ Duke University) is a lecturer in the Department of Biology‚ Lafayette College‚ and has taught botany since 1978 and supervised the General Biology Laboratories since 1970. Research interests in physiological and forest ecology have culminated in several publications. Other interests include
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dietary reference values‚ energy balance‚ nutrient deficiencies and malnutrition affect the balance of a person’s diet. ----------------------- There is not one single food or type of food that provides all the nutrients that the human body needs to function efficiently. A balanced diet will depend on the types of food eaten over a period of time and the nutritional needs of the particular individual. The wider the variety of foods eaten‚ the more nutrients will be provided by them. It is now known
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Contributors to Bacteriology In an unassuming way‚. they moved agar from the kitchen to the lab‚ revolutionizing bacteriology WOLFGANG HESSE T RANSLATED BY D IETER H. M. GR~SCHEL Walther Hesse was a well-known community health physician in the Kingdom of Saxony‚ a student of Max von Pettenkofer‚ the father of hygiene‚ and of Robert Koch‚ the father of medical microbiology. His American wife‚ Fanny Angelina‚ introduced agar-agar to the new science of microbiology. The Hesse Family Walther
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is an excellent source of vitamin C which is use for skin lightening. Lychee is Extremely rich in Vitamin C and contains an approximately of 40 percent which has more Vitamin C than orange. This is the reason why we chose lychee because of the nutrients that are Here so we used it as a research for our science investigatory project. We all know that the lychee fruit could be a sweet desert that can be served in our homes. But What we didn’t know about this fruit is that it could help
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- 3 Petri dishes prepared with agar - 1 disinfected swab - 1 bottle of disinfected water - A piece of filter paper - A hole puncher - 4 test tubes - 1 measuring cylinder - 1 pipette with disposable tips - Tetracycline - Clindamycin - Benzoyl peroxide - 1 beaker of water - P. acne bacteria culture - 1 forcep - 1 digital weighing scale - 1 marker pen 1. Before starting the experiment‚ make sure you clean your work area with Chlorox and wear gloves at all
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5/14/2009 Introduction The purpose of this study is to differentiate and identify two unknown organisms provided by the instructor in a nutrient broth. It is only known that the two organisms are from vomit; one is gram-positive and the other is gram-negative. It is necessary to first separate the two organisms by inoculating a nutrient agar plate using the streak-plate method. The initial streak-plate procedure was performed and placed in the incubator at 37◦C for 24-48 hours. Upon
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NAME: LAVERNE HILL LECTURER: MR. NATHANIEL GALE SUBJECT: INTRODUCTION TO NUTRITION Introduction Good food is a basic requirement for the human body. It is of prime importance in the attainment of normal growth and development. Food not only satisfies the appetite but aids in the maintenance of all body processes and supply essential energy required for maintaining body temperature and activity. In the role of nutrition‚ food cannot be neglected in the promotion of health and
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