A-LEVEL BIOLOGY LAB REPORT NAME: NURUL AYUNI BT SABRI GROUP: 11SC4 TITLE: THE EFFECT OF CAFFEINE ON HEART RATE LECTURER : MDM ZAKIAH BINTI ZAKARIA TITLE The effect of caffeine on heart rate OBJECTIVE To determine the effect of caffeine on heart rate of daphnia INTRODUCTION Caffeine‚ medically known as trimethylzanthine. Its chemical formula is C8H10N4O2. When in pure form‚ caffeine is a white crystalline powder that taste very bitter. 1The most common way
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Mammalian Kidney Investigation Background Information: The kidneys are dark red bean -shaped organs that are a very important pair of organs that perform many functions. The kidneys have a convex side and a concave side. They are each about the size of a fist. The kidneys are located near the middle back of a human‚ just below the rib cage‚ one on each side of the spine. One kidney is located below the spleen on the left side of the body‚ whereas the other kidney is located just below the liver
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cells arise from other cell through cell division 5 types of different Microscopes 1. Light Microscope- produces 2-D image Direct descendants of Hooks scope> take two lenses to a light source> used this to magnify images up to 1‚000 fold. 2. Confocal Microscope- uses lenses& a light source> produces a 3-D image. 3. Fluorescence Microscope- 2-D or 3-D‚ allows us to visualize fluorescent dyes. 4. Transmission Electron Microscope- it shoots a bean of electrons through a sample‚ and it collects whatever
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1. The advantages of using an electron microscope is that it has a greater magnification‚ so you can see more detail about the organism. It would be preferable to use a light microscope when you want to see the cell in the act of moving or dividing. 2. Prokaryotic cells don’t have organelles like eukaryotic cells do. Eukaryotic cells contain its DNA within its nucleus‚ while prokaryotic cells keep it within the nucleoid. Prokaryotic cells are also more minute than the eukaryotic cells. Also although
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Biological Currency The objective of this lab is to figure out whether or not this money is counterfeit. We will attempt to find the information needed to prove that the money is counterfeit or not by looking at it under a microscope and by using iodine drops to compare the money’s result with the results of different items. Counterfeiting money is not a new to any country. It started when paper money was first made. Some countries attempt to counterfeit rivals money to drive their economy downward
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Biology Inheritance – Mitotic Squash of Garlic Root Tip Mitosis is the process of cell division; it is the process by which a eukaryotic cell separates the chromosomes in its cell nucleus into two identical sets in two nuclei. It is generally followed immediately by cytokinesis‚ which divides the nuclei‚ cytoplasm‚ organelles and cell membrane into two cells containing roughly equal shares of these cellular components. Mitosis and cytokinesis together define the mitotic phase of the cell cycle—the
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mitosis division to produce eight spores (asci). These asci are held in a sac called a perithecium or ascus‚ a fruiting body that rupture and release the ascospores when they’ve reached maturity (Cyr‚ R. 2002). These spores are easily viewed under a microscope and have mutant strain colors with different patterns that serve as proof of crossover events. Wild-type (black spores) and non-black spores (tan) we used to detect crossing over. The asci can be arranged in 4:4: meaning 4 black spores and 4 tan
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BIOLOGY LAB REPORT PRACTICAL M1 TESTING FOR MACROMOLECULES Title : Testing for Macromolecules Abstract : To test for macromolecules (carbohydrates‚ lipids‚ nucleic acids‚ and proteins)‚ iodine solution‚ alcohol‚ aceto-orcein stain and copper sulfate solution are used. The conclusions for all of the tests are positive. Introduction: A) Carbohydrate (starch) Carbohydrates are chemical compounds that contain oxygen‚ hydrogen‚ and carbon atoms. They consist of monosaccharide
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Cells are the basic functional units of all organisms. Cells are the smallest unit of life and are often called the "building blocks of life". The distinction between prokaryotes and eukaryotes is considered to be the most important variation among groups of organisms. Eukaryotic cells contain membrane-bound organelles‚ such as the nucleus‚ while prokaryotic cells do not. The differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts‚ the
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Language Arts Period 3-4 Ms. Truax March 28‚ 2005 Forensic Science Forensic scientists solve exiting and puzzling mysteries‚ which makes the unsolvable crimes solvable. Forensic science started in England in the 1780’s. Scientists use microscopes that can magnify things from 1‚500 to 250‚000 times! This enables them to contribute like none other to the capture of criminals. In order to become a forensic scientist‚ first you must become a scientist first. The history of forensic science
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