Biology and ESS
For Biology and Environmental Systems and Societies Discussions
1,489 topics in this forum
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Hi, I'm Biology SL student and currently designing an experiment about yeast fermentation. My teacher told us to do the lab by varying one of the factors affecting yeast fermentation. But.... I mean, isn't it too simple? For example, I could just change the temperature of each dough by putting each of the the bowls or whatever in water bath, ice bath, room temp, etc and see the results. How to do that kind of experiment is like everywhere in the internet. I've always been wondering if it's more important to invent a very creative lab which not others can think of (the results even can be unpredictable, too!), or it's just fine to do a very normal and predictable one as…
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Let me keep it short and sweet: Does one have to graph a control in the results section of the IA? I tested the effect of urea concentration on the rate of reaction of urease- i did a control trial using 0% concentration (water) would I have to graph this? if yes, I have a slight problem seeing that my data points have a clear logarithmic shape to them (like those enzymes graphs in textbooks with the plateau phase), however logarithmic best fit lines are N/A with data points at 0. Thanks in advance
Last reply by Eastcoast93, -
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Paper 3! Our school only does Evolution and Cells and Energy (C and D) How about you guys? Which one do you find the most interesting?
Last reply by Drake Glau, -
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Are they the same? Why different spelling then?
Last reply by Sandwich, -
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Hallo, I have a really huge problem conserning my assessed laboratories in IB Biology. Please do not think I am exaggerate read the post first and judge later. My teacher in Biology cannot grade labs, at all. He does not know the criteria and does not bother learning them. As he is the only IB biology teacher with a license in the region he cannot be fired. He grades everyones labs waaay too high or is extremly affected by the personal relationship with him (if he does not like you, you WILL get a lower grade). Now so that you do not think I exaggerate I can tell you that the last year students were all lowered by 20 points which is the margin of 40% possible points to ac…
Last reply by dessskris, -
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Hey so i need to get a design lab done and you cant do one on an experiment you have done. So how do you do it, are there any guidelines ? help would be appreciated. thanks!
Last reply by Award Winning Boss, -
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Hi, Ok so we did a photosynthesis lab measuring the effects of fizzy water and limewater on photosynthesis by looking at the change in CO2, O2, LIGHT INTENSITY AND TEMPERATURE. I have all the data and about 4 sets of runs. How and what should I graph? For example if I want to graph the fizzy water vs the lime water.. what should be on the y and x axis, Im sooooo lost.. thanks
Last reply by LMaxwell, -
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Hey! We have a tank full of Daphnia in school, any good lab ideas I could do?
Last reply by Access Denied, -
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I have a few days to come up with a research question on Photosynthesis. So far, I have came up with 2 ideas that may or may not be very good.. =/ 1. pH on the rate of photosynthesis. The problem with this one is how I would actually carry out the experiment. I'd need 5 different pH values, and I intend to use 2, 4, 6, 8, 10. I need suggestions on what chemicals should I add to get the mentioned pH values.. help anyone? 2. I was thinking since Ribulose bisphosphate is an important component in photosynthesis, is there any sort of chemical/enzyme i can add into the experiment that'll either increase or decrease the amount of Ribulose bisphosphate present in the plant lea…
Last reply by shushu, -
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I am lost in my data and can't figure out what statistical tests to run. I exposed plants to five different wattages of light over 15 minutes. I have a measurement for each minute, and I did five trials for each wattage so my data table for each wattage is five trials by 15 minutes. If I take an average of each minute, I can compare by wattage for rate of photosynthesis. What other statistical tests could I run with this data?
Last reply by awebb, -
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What is the highest standard deviation that is acceptable in IB lab reports? For example, when you do tests like the mann-whitney test (in psychology) there is a certain value and when you get a value above it, you know it's significant (or insignificant). The problem with the standard deviation is that the "best" or least value you can get is 0, but then there is no maximum for standard deviation. I got 20.83 for some results, and is that ok? How do I know whether that is too large anyway, for any experiment? thanks
Last reply by Avan:), -
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DNA, anyone? Transcription? Translation? DNA replication 5'3. Carbon? DNA structure? Proteins? HL aspects of topic? Anyone with knowledge on this chapter! Please helpp! As I missed lessons and my teachers travelling so must self study! Please help! I hate this whole chapter! And I'm very lost what's a 5' carbon? What's the enzymes involved? And any other processess? Thanks
Last reply by Kirimin, -
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So for my Bio IA, I know that I would like see how does concentration affect the rate of a reaction but I have no clue how to conduct an experiment on this. Any simple experiments for my topic?
Last reply by Kirimin, -
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Unfortunately, I am a Biology HL student. Choosing Biology HL was actually against my will; I had to take it, because I had B&M and German B, both SL, no HL. Given that I didn't want to change B&M or German to any other subject, I took a chance and chose Biology HL. I regret it 24/7. I have no desire to study either Medicine or Biology, or anything else closely related to Biology, for that matter. However, my teacher is not very devoted to us (yes, there are only 2 HL students, including me) and I have to learn everything by myself. Has anyone got any tips? Anything that could assure me I can pass this freaking exam? And yes, my Biology exams are on 17 & 18 Ma…
Last reply by Sandwich, -
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Experiment : osmosis. Repeats: 5 concentrations: 7 Measured both mass and length change !!! What do you suggest I use to process each data Myllo i teacher said a percentage change graph how on earth do I do that Also I don't get the controlled and uncontrolled variables!! I put a paper on top of each test tube so nothing evaporates,, I didn't control temp of room??? What else?? And what type of limitations and improvements can I mention als
Last reply by Summer Glau, -
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Hey guys, I'm doing a lab to test the effect of one factor on catalase reaction rate. We class is trying to decide whether we should dilute the hydrogen peroxide from 3% to 1.5%. What do you think? Thanks! =)
Last reply by Drake Glau, -
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Osmosis experiment I WAS given concentration ready for me due to time factor! But there all in mole like 0.2M and 0.4M 1M etc... I don't know how they did it???? Do I have to include the method of preparing this conc of sugar if so HOW Also should I include conc of sugar in veggie . Eg beet root I couldn't find accurate data on net anyone have any idea
Last reply by Emmi, -
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I've been staring at my lab report for about three hours right now and I can't figure it out. It's on a topic that I am having a hard time understanding generally so I could really need some help! Its a design lab and my aim is; The aim of this investigation is to find out how different climate circumstances can alter the rate of heat loss on various shapes. But now I can't figure out a proper hypothesis since the body shapes will be two different kind of shapes (rectangular vs. a more square shape) and thus, I will get different results for them I am assuming..? so how do I phrase this hypothesis? My teacher gave me this: "If variable (x) is ..............then .....…
Last reply by dessskris, -
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My class is doing these experiments, as probably most you do, after which you have to write a report. However, most of the people call it different names and write different names on it. I just want to make sure, which is the correct one. Here are some of the examples of our names: Biology practical work Biology laboratory work Biology laboratory report It's a simple question, but I couldn't find a precise answer.
Last reply by MariusIBDP, -
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So my topic for my Bio IA is the effect of water concentration on the rate of enzyme reaction. But I have no idea how to even conduct an experiment on this topic! I need help with an experiment for the topic and what materials I need in order to conduct the experiment. Any help would be greatly appreciated!
Last reply by kim luffy, -
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Hey can anybody suggest some good environmental sites,journals,links to articles for ESS? It would be much of help.
Last reply by Bhagyashree, -
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Hi everybody! For our IB Bio HL Year 2 class we have to design a lab involving biodiversity for practice for the actual internal assessments. Since this is not an actual IB exam, it wouldn't be academic dishonesty asking for some ideas. Me and my partner are currently considering doing a lab about the pH level of the soil in different areas and its effect on plant and animal life. However, a very similar lab has already been done. Thanks in advance for your help!
Last reply by thinkerlearner, -
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Could I do an IA on what sex is better at remembering random sequences of numbers? My controlled variable would be the same sequences. My Independent variable would be the different sexes. Could I do this as a Biology IA? Would this work?
Last reply by Sabs44, -
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Hey I study IB Biology HL... Last year my Bio teachers neglected the practicals because we didnt have any double lessons in which to do them and i think we have done about 20 hours max of biology practicals... which means we have 40 left to do by May, but we only have 1 double biology lesson a fortnight (so we do most practicals then)... But what happens if we cant finish the 60 hours of practicals? I'm confused and im freaking out, every other subject seems to have a plan - except biology :'(
Last reply by Crazy Gemini, -
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I'm doing a photosynthesis lab in which I'm taking 5 different lamps, putting 5 different colors of cellophane (red, blue, yellow, green, purple) over the bulb to change the wavelength of the light. A beaker full of water will be placed below after placing a plant in the water so it's fully submerged. Then I'll use probes to measure the pH every 10 minutes. This is a 5x5 experiment so I'll have five plants per lamp. What I'm wondering is what type of bulb should I use in the lamp and also what type of plant I should use. Really I would think any plant would work and I think UV bulbs would work just fine (though using plain white ones if possible would be more cost effecti…
Last reply by Sandwich, -
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hey guys I'm sitting in front of our lab design with my lab partner and we're seriously stuck! Could someone please tell us where you can find catalase, and what is the best substrate to work with to find the reaction rate? Thank You
Last reply by Leoo, -
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Hello guys! I am in IB1 at the moment, and currently doing my first IA, I have the basic Intro, Apparatus, Method that happens before the experiment, is there a specific framework to follow? I'd imagine its similar to Biology IAs. Thanks! I'll post attached what I have currently so you can have a look. Its of course unfinished since I have not done the actual experiment.
Last reply by dessskris, -
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I was thinking that since most of Bio. is terms that I would flashcards for the terms as well as the questions in the syllabus. Sorry if this sounds completely stupid but I was wondering what people did to make their flashcards standout (e.g. simple concise definitions, color, diagrams) because I'm gonna be coming back to terms that I learned now at the beginning of Bio when I'm taking the exam in 2 years. Also, for any of you IB graduates, would you recommend forming notes from a textbook or strictly using the syllabus to make sure you know everything because the textbook we use, C.J Clegg, sees pretty comprehensive Appreciate any help
Last reply by IB Andy, -
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During the last few weeks, our bio class has been doing our bio design lab, so I chose my topic based on the digestion of lipids. However, during the experiment, I realized that there are no result even when I increase the lipase concentration to 10%. I am doing this lab with a pH probe and I add a drop of detergent before every trial. Does anyone know why the result shows that there is no digestion? P.S. we have calibrate the pH probe many times already, and it works fine.
Last reply by IB Andy, -
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Hello! We are currently doing a design lab and it should be about surface area and heat loss. I wanted to use beakers and have 5 different amounts of water in each one and then heat them up and then see the heat loss and which would be the fastest. But my teacher told me it is too simple, could anyone give me any tips to how I could develop my idea? Thanks! / Moa
Last reply by Drake Glau, -
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Can I only bring in for example, the design, cause I only want that to be checked and graded from a particular lab? What exactly would I have to bring in then?
Last reply by Mahuta ♥, -
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Hey! I did an IA about how music affect our ability to concentrate and I tested a little bit over 100 people, in different environments (with music, without etc.). Im stuck as to what test should I do to examine the data... Can you make any suggestions?
Last reply by anne.antoinette, -
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What graph will show my Biology lab results more clearly, line graph or bar graph?
Last reply by Nea Lumina, -
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What is it like to take this subject? I am considering dropping History and taking ES as you only need it for a year, it is doable.
Last reply by Andyboi, -
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Hey guys, I'm correlating the effects of the tempo of music and blood pressure I have a sphygmomanometer and everything, I'm set to go. Just wondering if anyone has any experience with a lab like this, or anything remotely close to it that can offer me any tips, link etc? Thanks!
Last reply by Leafed, -
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Hello , were just starting our first internal assesement about OSMOSIS.. teacher tld us to plan using any veggie like beetroot potato orange,, and write equipment we need.. its our first time,, so im not really familiarised with what else we need to do? and HOW TO GET A 7?
Last reply by dandoon96, -
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I am doing my first design-lab in biology, and I'm just wondering if somebody can tell me a simple outline of what it should contain.
Last reply by birdman, -
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I'm doing a lab report in biology; and I'm wondering if I have to come up with a formula for the results?
Last reply by Vislabak, -
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I know it is not advised when it comes to method, but what about in the introduction? Can I write Ive noticed blah blah blah...
Last reply by Goncalo Santos, -
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I'm in HL biology, I'm looking into buying either the Heinemann HL Bio book or the CJ Clegg Bio book. Yes, I do use Allott and our school supplies the big Campbell and Reece book, but C&R is huuuuuuuge and a pain to look through, and I already use Allott for studying like mad, however, I'm wondering if anyone has seen the two textbooks I mentioned above, and would give a suggestion to which one is best to use for supplementary reading (the notes we get in class are from the overhead with few diagrams so they're hard to memorize). For SL chem, we use the Heinemann book, and I love it, but everyone seems raving mad about Clegg for biology...
Last reply by khalid, -
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I feel like an idiot asking this but I'm having my first Bio test on Thursday so I being particularly OCD about my notes I can't seem to write good notes whereas last year, not to brag, but my notes were perfect. The problem for me is every time I leave something out while writing my notes I keep thinking about whether its going to come up in 2 years and I won't have studied it and its really making me procrastinate. Stupid, I know. But at the same time, I dont want to include a mass of info that I'm not gonna need so I was wondering whether I could get some advice from anybody.
Last reply by JenRice, -
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Our biology teacher said there is no syllabus and she has to make one herself, but i think she is bull ****ting. Please, please, can someone give me the HL syllabus or a website where i can fully download it from? Thank you! btw. in my textbooks there are syllabus statements, but only for each chapter, i would like a syllabus which has everything on it!
Last reply by IBtank, -
Biology lab report
by Guest Laurad- 1 reply
- 772 views
I did my experiment twice so would I have to include data from both? so id have two tables and two graphs?
Last reply by Drake Glau, -
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We're doing our first lab this Thursday, and out teacher told us to start thinking and planning the experiment. I have planned to use a bag made from dialysis tubing containing a solution of sodium chloride. I will lower the bag into distilled water and see if the volume increases. However, my teacher keeps asking me if this is such a good idea and if I could do it in any other way. What do you think? Do I have a good plan? What is missing? What should I do?
Last reply by Drake Glau, -
Biology Design Lab Help
by Guest Evil Mouse- 6 replies
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I decided that I will investigate the effect of temperature on the enzyme bromelain. The independent variable is temperature but I'm not sure about what the dependent variable could be. I will use jello as the substrate.
Last reply by rosirosiful, -
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I am taking Biology SL and will be taking the May 2012 exams. For revision purposes I have been referring to the Biology syllabus that says: first examinations 2009. http://ookgm.meb.gov.tr/userfiles/file/programlar/ibo/d_4_biolo_gui_0903_1_e.pdf Has the Bio syllabus changed since then? If so, what is the new one? Thank You xxx
Last reply by Turkalurky, -
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- 911 views
Hey guys, I was just wondering if anyone know any good book for a further study in eyes. For example, the L-cone, S-cone and M-cone. How human see colour and anything along that line.
Last reply by IB Andy, -
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Our teacher sent us a list of topics to inspire us, but there is nothing that interests me on there... The only human topic was how X influences reaction time... And the rest were either bacteria-related or plants... Im not a big fan of studying photosynthesis & dont have the knowledge to do anything with bacteria... What could be an interesting but easy biology field I could make a lab in? I was recently reading about the blind spot and got interested, but I dont know if its something good to make my internal assesment about it... And what should I test? Something's influence on it?
Last reply by Mahuta ♥, -
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Who else studies Enviro and if so, is anyone finding that it is actually harder than they expected it to be to get good marks? Any suggestions on how to go abut tackling questions?
Last reply by nerdiest, -
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okay so we had sheep blood, nacl and water for test tube (all measurements will be in cm3) A: we put 6 of water, 0 nacl, 0.5 of blood B: 5 water, 1 nacl, 0.5 blood C: 4 water, 2 nacl, 0.5 blood D:3 water, 3 nacl, 0.5 blood we let it sit for 20 minutes, then we took some, put them in a cuvette and measured it with a colorimeter. (Calibrated at 470nm) the results were: A: 1.098 B: 1.349 C: 1.675 D:1.705 okay so i dont really get the meaning of the results, and why did we use a colorimeter? so what is happening inside if the reading for A was 1.098? please help
Last reply by habibibibi,
