This website uses cookies to ensure you have the best experience. Learn more

Lab Essay

516 words - 3 pages

Introduction Water plays a vital role in biological systems. Some species are able to survive in diverse environment such as fishes in salt water, Cactus plants in dry land and mammalian cells in aqueous surrounding because of the specialized underlying structures of these life-forms. In order for us to appreciate these special adaptation, we first need to know how a typical plant or an animal cell organelle behaves in different water and solute concentrations. In this lab, we will determine the effects of hypertonic, isotonic and hypotonic solutions on plant and animal cells. In general when an animals cell's placed in hypertonic solution it shrivels; a plant cell on the ...view middle of the document...

Then we observed rabbit blood cells placed in hypertonic, hypotonic and isotonic solutions. And finally, we observed some of the organelles, particularly the nucleus' of chicken cells as they were placed in detergent and water. Our results reported below show, when plant cells were placed in 0.2M, 0.3M, and 0.4M, and observed after 1 hour, the cells in high molar (0.4) solution plasmolyzed, and in low molar (0.2) solution looked normal. The rabbit cells shrunk when they were placed in hypertonic solution, and they appeared to be larger in size when placed in hypotonic solution. The chicken cells placed in detergent and also in water, appeared to have a reduction in the organelles.Materials and Methods The materials and methods for this lab are described on pages 25 "" 27.Experiment to determine whether plasmolysis is reversible Our control for this experiment was 2 pieces of Rhoeo discolor leaves placed in 0.4M sugar solution, one for 15 min. and the other for an hour and observed both under the microscope. We also had 2 experimental pieces of leaves placed in the same sugar solution for the same amount of time. Then we placed the experimental Rhoeo discolor leaves in water for about 8 minutes (first one after 15 min treatment of the sugar solution and second after 1 hr treatment of the sugar solution) and observed the results.Experiment to determine if erthrocytes swell and burst when placed in hypotonic NaCl.Prepare 2 slides of rabbit blood (1-2 drops) for which one would be the control for this experiment, and for the other, put a drop of hypotonic saline (NaCl) and observe both under the microscope.

Other Papers Like Lab

Chemistry Lab Essay

1265 words - 6 pages CHM138 Lab 1 SAFETY, EQUIPMENT, AND THE SCIENTIFIC METHOD 1. A student enters their laboratory setting and is getting ready to set up. What preparations should be made?  (16 points) The first thing that should be done is that your work area should be disinfected with a solution of 9 parts water to 1 part bleach equally a 10% bleach solution suitable for disinfection. Also important is to not allow or participate in any eating or

Lab Final Essay

638 words - 3 pages ------------------------------------------------- Lab Final Unit 11 Lab Final: Voltage Regulator with Constant Current Limiting (PORTFOLIO) Scope and Intention of the Project: The Lab Final Project is a self-directed project with specific requirements provided. You will be given a design task which utilizes a standard circuit in the textbook. You will apply knowledge that has been acquired in lecture, assignments, and previous labs

Electrophoresis Lab

346 words - 2 pages General Biology and Lab II - BIO196 Gel electrophoresis Report Sheet Name: Partner: Date: Conlusions The results of my testing indicates that: Blood from Suspect Number __________ was at the crime scene. Explain your evidence for coming to this conclusion. Is this sufficient evidence to convict the the suspect of the crime? Why or why not? It what way did this lab simulation differ from what is actually performed in a

Lab 7

323 words - 2 pages Antonio Johnson Class: Access Security Unit: IS3230 September 25, 2014 Lab 2 Design Infrastructure Access Controls for a Network Diagram Lab 2 Answers 1. To check it there I any malware, updates where it be made, and to know if any other viruses are the system or application 2. help to cut down storage and backup cost, to meet legal regulatory requirements for retrieving specific information within a set timeframe. Data strategies

Lab Report

1527 words - 7 pages available and easier to use. The two Lab experiments will be done in order to compare values when using large numbers and a few numbers of coins. The hypothesis for the two experiments is that approximately 50% of the coins will decay in the first throw. The second hypothesis for Lab 2 is that four of the eight coins will show their heads up. Method for lab 1 To perform the experiment, hundred pennies and a box with cover were used. All the

Chemistry Lab

928 words - 4 pages Madison SmothermanLexie Rogers8/7/14Who Wants To Go Off-Road? Purpose The purpose of this lab is to view speed and acceleration via use of a toy car. Apparatus Procedure 1. Use a meter stick and tape to mark out 5 meters of the floor with 1 meter increments. 2. Time how long it takes the car to go one meter starting at zero using a stopwatch. 3. Repeat number 2 with the car traveling 2 meters, 3 meters, etc. 4. Repeat steps 2 and 3 with

Ccna2 Lab

1278 words - 6 pages Lab L - Initializing and Re g eloading a Rout and S g ter Switch (Instructo or Version) V Instructor No Red font color or Gray highlights ind ote: y dicate text tha appears in the instructor copy only. at Topology T Objectives O Part 1: Se Up Device in the Netw et es work as Show in the To wn opology Part 2: Initialize the Router and Reload R Part 3: Initialize the Switch and Reload S Backgroun / Scenar B nd rio Before sta arting a

Evolution Lab

1353 words - 6 pages .” Materials To complete the experiment, I will need access to a computer and the Evolution Lab simulation at the University of Phoenix website. The Evolution Lab will allow me to simulate tests by changing the input values or parameters. The results should show the effect of natural selection, and how these changes may influence the beak sizes and population of the finches in the Darwin Island and Wallace Island over various time periods.   Methods

Electronics Lab

897 words - 4 pages Abu Dhabi University Collage of Engineering& Computer Science Course: Electronic Devices & Circuits Course ID: CEN304 Course Lecturer: Dr.Montasir Qasymeh Lab 1: DC& ACCharacteristics of Diodes Prepared by: Eng. Ahmed Sweleh Date: 20/9/2012 1 Objectives: This lab aims to educate the student in the following:1. 2. 3. 4. Putting the diodein reverse bias and forward bias. Measuring forward current (IF) and reverse current (IR

Lab Report

820 words - 4 pages Lab Report Introduction: Natural selection relies upon the assumption that all organisms produce more offspring than can survive in an environment demonstration limited resources. The heritable traits that are best suited for a particular environment should be passed on at a greater frequency then those less adaptive traits. Natural selection is unique in that it leads to adaptive change, and these changes are likely to lead to increased

Lab Report

953 words - 4 pages The use of 1 Microscopes Name: Khulud Abdulaziz Nazer ID: U00045236 September 23 2014 General biology lab Section: 13 T Instructor: Tasneem Obaid Introduction: Microscopes are instruments used to enlarge objects that are too small to be seen by one’s eyes. Microscopy is the science of the examination of small objects using microscopes. Technically we have two types of microscopes, the optical microscope which was first

Related Essays

Planners Lab Essay

302 words - 2 pages Planners lab Successful financial planning is a critical success factor for every organization. The Planners Lab (PL) is not restricted to financial planning, but this is a primary focus. Example applications include strategic planning, financial planning, capital budgeting, balanced scorecards, engineering project investment analysis, merger and acquisition analysis, and sales forecasting. Planners Lab models are written in an

Lab Report 693 Words

693 words - 3 pages Horie 1October 16, 2014Chemistry SLMrs. FinneganRiku HorieTitration LabAIMReferred to the lab report sheetRESEARCH QUESTIONReferred to the lab report sheetMATERIALSReferred to the lab report sheetMETHOD OF DATA COLLECTIONReferred to the lab report sheetMETHOD OF RELIABILITYReferred to the lab report sheetMETHOD DATA MANIPULATIONReferred to the lab report sheetRAW DATA TABLEPROCESSING DATA TABLE:CONCLUSIONBy having this experiment, we were able

Lab Report 1407 Words

1407 words - 6 pages LABORATORY NOTEBOOKS Why do we keep a lab notebook? In the ‘real world’, you will be expected to record what you do and how you do it, with the data clearly identifiable. There are 2 reasons for this: • Any scientific experiment is only considered valid if it can be repeated by someone else using your notebook. • If you develop a new product or process, your notebook becomes a legal document that can be

Lab Report 886 Words

886 words - 4 pages Weekly iLab iLab: Exploring the Microbiology Lab FirstName Tiffani_LastName: Whitehead Section 1 Lab Safety 1. There are four safety equipment items that a lab should have. Identify two of these four items. (2 pts) Biological Safety Cabinet, Eyewash and shower 2. Identify one of the three ways to keep your work area safe. (1 pt) Keep your workspace free of all unnecessary materials 3. There are five recommendations for