Biology and ESS
For Biology and Environmental Systems and Societies Discussions
1,489 topics in this forum
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Okay, so I'm a first year (11) IB student and my teacher assigned us to look for lab ideas for cells. I have no idea what I"m doing or what I should be looking for. If anyone can help me with a little bit of guidance.. it would be greatly appreciated!! (:
Last reply by Sandwich, -
- 1 reply
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Hello guys, I just performed an IB HL Bio Lab testing systolic and diastolic pressure after the ingestion of Gatorade. Thing is, the data collected was only the blood pressure of the subject BEFORE and AFTER ingestion. So for example, I only have one number that means the difference of the blood pressure before and after. How am I supposed to complete Aspect 3 of the Data Collection and Processing then? How am I supposed to make a line graph with that graph? Is it possible to get the marks by doing other graphs, such as bar graph? If so, how would I make up the points for "THE GRAPH MUST INCLUDE ERROR BARS"? Thanks!
Last reply by Sandwich, -
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What do people normally do for ESS design IA that has to be a field study? So far, all I've done is counting weeds or organisms.
Last reply by alefal, -
Bio EE
by JessAspoas- 1 reply
- 809 views
Hey guys, I am starting to write my bio ee and I want to do something with twins and nature vs nurture etc, anyone have any more specific ideas to do with this topic?
Last reply by Annddrreww, -
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Okay! I need all of the help I can receive as soon as possible because tomorrow is my last day to experiment! I'm testing the effect of temperature on Lipase. I'm using vegetable oil because of all the lipids. I'm getting to my desired temperature by using a hot water bath and then I'm testing the amount of lipids left by using the spectromic 20d+ so test the absorbency. My question is: what is the lipid absorbance wavelength to use? I've tried research it but I keep getting different answers. PLEASE HELP
Last reply by Annddrreww, -
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I am working on the evaluation part of my IA. I want to ask whether measuring the increase in vertical length of the plants above soil per day is LESS accurate than the increase in biomass per day. If so, why is this the case? (Is it because it is possible to have two plants of the same length, but one with greater biomass and hence higher growth rate?) Your help is much appreciated !!
Last reply by alefal, -
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Hey guys, we have a really crappy bio teacher who's made a complete mess of explaining these two chapters. Do you know any really good thorough videos that I can use to teach myself these concepts as I do not entirely understand the textbook? Thanks,
Last reply by MLI, -
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hey everyone, I'm looking for precise answer to this: explain the importance of complementary base pairing in replication, transcription and translation. i've been looking for exact answer and found only informations that don't fully answer it, or I'm not sure if they do. thanks
Last reply by Sandwich, -
- 1 reply
- 839 views
Someone can tell me some ideas to make a lab for NS ?
Last reply by CkyBlue, -
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I have a question about rounding the Mean and Standard Deviation in my Table of Results. If the data that I collect (DV) is logically rounded to 0 decimal places because it is in full units.... What do I do with Mean & STDEV? Do I round them to 0 as well? It looks very strange and seems un-precise. Or maybe round even the DV (the bmp) to .0 or .00? I just heard we have to be consistent. Thanks.
Last reply by IB-Adam, -
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So I'm taking my final environmental systems and societies exam in about a week and it's the only subject of mine that I'm feeling slightly uncomfortable about. I've been endeavoring to go over my notes to ensure I know the content, but find that when I do past papers, it actually varies quite significantly from straight testing of syllabus details. I'd really appreciate any advice!
Last reply by alefal, -
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I just realised this sounds kind of like an exam question. This is my plan, learn the textbook to death? What do we think, do-able or no? Thanks
Last reply by Nessa, -
Video Tutor
by Guest hiddenninja- 1 reply
- 619 views
I'm currently looking for a Biology tutor I was wondering if anyone has tried using Video Tutor ( http://www.ibsurvival.com/links/goto/297-video-tutor/ ) Did it help? What was your experience? or Do you think that it's not really worth it and if I work extra hard I'll get the same results? Thank you
Last reply by marshiemellow, -
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Heey everyone!! I am doing a design about how omega-3 butter affect human health and nutrition.. I am stuck on the variables, what should I include in the dependent and independent variables? thanks:)
Last reply by fяαи, -
Explain what a prosthetic groups and a conjugated protein is , please:)
Last reply by _Sam_, -
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Basically have to do the entire lab in a night, without any real data. The design section will count, the rest will not if it is lower than the next two labs. Advice/Help/Recommendations?
Last reply by Mahuta ♥, -
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Hey everyone, I'm revising for my Biology mocks and one of the topics is units used in energy pyramids. Is it J kg-1m-2year-1? I can't seem to find it anywhere in my notes. Thanks!
Last reply by GirlwiththeBlueBox, -
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Hi, I have just noticed that I did my calculations wrong in ess. I did all the data according to the wrong calculations and wrote my discussion and conclusion according to it. Will my teacher give me a 0?
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Hello, we are preparing for our IB1 exams at the moment and I was wondering if there is a data book for Biology. We have one for Chemistry and Physics so I assumed so, but could not find one online. On a similar note if there is no data book are we expected to memorise Amino Acid codons?
Last reply by _Sam_, -
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so im in dp2 at the moment, and biology HL is one of my subjects. however, i cant ever seem to get a high grade on any of my quizzes, EVER! i dont know how to study. so i really need some tips on how to study!!!! please please please!!!!
Last reply by Mahuta ♥, -
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Okay, so for my Biology HL labs I'm having a bit of trouble. For my experiment, I am testing the effects of temperature on Lipase. To do this I am combining vegetable oil (because of the lipids) and Lipase in a test tube - in a water bath- and using Sudan III as my indicator. The major obstacle I am facing currently is figuring when I put the 3 drops of Sudan III in the test tube after I have allowed 5 mins for the reaction to occur, I mix the indicator in and all that happens is the mixture because a shade darker. Am I not suppose to mix the indicator in? How do I get data from this? Any helps/tips? Thanks!
Last reply by Blee711, -
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So tomorrow marks the adventure into an ecosystem for my Biology (SL). I'm testing to see what the dissolved oxygen level is in certain sectors of a stream in relationship to the crayfish population. I've assembled all my materials and things like that, but I'm wondering about controlling variables. I understand that in my conclusion I will be writing an error analysis on how the variables I was unable to efficiently control may have skewed my results. But I mean the stream is constantly flowing, so turbidity, temperature, depth where the crayfish was, and murkiness of the water could all really play a factor, only some of which I can control. My question is: Is it alrigh…
Last reply by GirlwiththeBlueBox, -
- 1 reply
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Okay, so for my Biology HL labs I'm having a bit of trouble. For my experiment, I am testing the effects of temperature on Lipase. To do this I am combining vegetable oil (because of the lipids) and Lipase in a test tube - in a water bath- and using Sudan III as my indicator. The major obstacle I am facing currently is figuring out the proportions of substances. How much vegetable oil to use with how much Lipase? Any helps/tips? Thanks!
Last reply by Mahuta ♥, -
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Hey can any one give me ideas on a lab design about Gaseous Exchange or Cellular Respiration I can't do temp, pH, or substrate concentration, or CO2 O2 levels? THANKS
Last reply by Bernardo Silva, -
Bio Design Lab Help: How Technology Affects Humans
by Guest dylaanz- 0 replies
- 861 views
Hey guys, So for my bio 20 ib class, we have to create a design lab about how technology affects humans. Though this is a very wide topic, I have no clue in how to design a lab I would actually be able to perform. I really want something do-able within around 2 hours and not requiring too much equipment.. Help guys ! Thanks in advance !
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Hi guys, I'm in Year 2 HL Biology Our class has been told to Design an investigation into a factor affecting germination in a particular species of plant. Does anyone have any suggestions about what factors I could change, what seeds to use or any other point that may be helpful in completing this lab? I've done my research but it would be helpful if I can get any help Thanks - Rimsha
Last reply by Rimsha Zareen, -
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Hey, so Biology syllabus I have is for first exams in 2009, but most of the subjects I'm taking (Economics, Russian ab in., English B, EE) got rid of that syllabus and got a new one - first exams in 2013. It'd seem rational there is also a new syllabus, but I couldn't find it anywhere on the web. My teacher couldn't find it in OCC, but she's not very computer-savvy. So, the ones who are taking exams in 2013 and 2014, do you have/study from a syllabus first exams in 2009 or 2013?
Last reply by The Economist, -
Lab Report HL Biology Nutritional Effects on the Body Design IA
by Guest Humaira- 1 reply
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We have to write a design lab on the topic of nutritional effect on the body. once weve handed them in the teacher will select the best 5 to perfrom. these experiments have to involve the use of people as subjects. I'm having a really tough time coming up with ideas. These are some ideas I have, though I am not very pleased with them and there not very specific: The effect of the amount of carbohyrdates (like rice) intake on how tired you feel a certain nutrient's (don't know what nutrient) effect on body temperature Eating more of a certain food and its affect on our saliva content. or pH? for example testing pH of saliva for calcium deficiency Any advice would be great…
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HI, I've been thinking of an EE topic and I came up with this, "What is the influence of age, gender and BMI on the myotatic reflex" and maybe discuss the diseases associated with the disfunction of the neurons responsible for this reflex after coming up with an experiment. Does it seem like a good topic? Thank you
Last reply by Mahuta ♥, -
- 2 replies
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I'm having trouble coming up with an EE topic, does this sound like a good one? "What is the effect of age and gender on the formation of visual and verbal short-term memories in the human hippocampus?" The experiment wouldn't be too complicated and can be done in school. Let me know what you think!
Last reply by Mahuta ♥, -
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Hey everyone, I need to write an IA in biology (HL) and it has to do with human health and physiology, more specifically with heart rate or respiration. Does anyone have any feasible ideas? thanks, cguerin
Last reply by Summer Glau, -
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Hello, I'm considering joining IB Biology HL. During 10th grade, however, I got a B as my final grade, and I'm quite disappointed in that. I was a B+, went down to a B from getting a C in my final exam. Meh. Do you think a B is good enough to join Biology IB? I quite like Biology, and am seriously considering joining. But scared that I'll probably fail miserably. Do you think I should join? Do you think a B in standard Bio is good enough?
Last reply by FreyaLu, -
- 5 replies
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Hey everyone Ok, i noticed that there are no notes covering the new syllabus for 2011 Environmental Systems & Societies. So i just finished creating one. They cover Topic 1,2,4 and 7. Feel free to download them ESS2011 Notes Or direct download EnviroSystemsAndSoc2011.pdf
Last reply by jackparker, -
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What should be in the cover sheet of a lab report according to the requirements? If you don't know, just tell what do you post in the coversheet.
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Hi, I will be taking Biology SL next year is ti hard, any tips and so on?
Last reply by Summer Glau, -
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I'm coming in to class tomorrow to discuss the exam with my teacher. Do you guys remember any questions/essays? I literally cannot remember any.
Last reply by Survival Robot, -
- 19 replies
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Hello people, Biology exams are comming up soon so I came up with an idea for us to share what WE think will come up this year on the paper, as You know the IB examiners do not spend much time creating questions and mainly end on previous ones. Haha. WHAT DO YOU THINK WILL BE ON THE TEST THIS YEAR ?? PS. I know this may be lame but it helps to reduce. Believe me!!!
Last reply by apple.toronto, -
- 10 replies
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I know, I'm stupid. I barely studied and I never learned anything these past 2 years. I hate IB Biology. So, I'm dead meat for the exam for sure. But I've had pretty good scores on the IAs. Am I completely helpless?
Last reply by BlancheBunny103, -
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I know I probably should've prepared better blah blah blah but here's my question: Is it better to skip these topics which I don't know (8.2 (Photosynthesis HL) and all of 9 (Plant Science HL) and move onto other topics and my options? I need to do all those topics too... What do you recommend?
Last reply by BlancheBunny103, -
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Try out http://www.study-ib.com/wiki/Biology It's got alot of free information on the subject and just in time for the exam!
Last reply by Study-IB, -
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Hey! Could someone please send me a few past exams in Biology? Preferably paper 1. I hope I'm not breaking any rules by asking for past exams.
Last reply by Survival Robot, -
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Hi! I'm planning on doing my extended essay in Biology. Here is my research question: "How does anaesthetics numb specific areas (nerves) in the mouth?" My question now is, how am I supposed to make an experiment related to this? I've been looking around trying to find something which I am authorized to do, but there's nothing to find. A quick answer would be so lovely seeing as I need to hand in my plan tomorrow for approval. Thanks in advance! Anyone? PLEASE HELP, GOT ONLY 2 HOURS LEFT! Thank you
Last reply by Sandwich, -
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I've been doing a few Bio SL exams and for some questions, I realize that my answers (what I have been taught/what is in the textbook) are completely different from the answers in the markscheme. Aka, different meaning, but still the correct answer. Also, the markscheme answers for the same question sometimes change from year to year. So my question is, if my answer is still correct but different from the markscheme, do I still get marks for it? Another question, if I write exactly what the markscheme says, without extra detail, do I get the mark? Or is the markscheme just a guide for the examiner-- because some MS answers aren't detailed at all... my notes are about 5 ti…
Last reply by BlancheBunny103, -
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Hi, I am a new YR12 IB student this year and this is my second IA in Biology. I have formulated my reaearch question but am not sure if it is ok or needs to be edited. Any help or feedback will be appreciated
Last reply by Crazy Gemini, -
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I had a few questions regarding Biology SL: How hard is it to get a 7? I know this is a subjective question, but relatively speaking, is this one of the tougher exams in terms of the curve? Also, would learning all the assessment statements suffice, or would it be wiser to go through and annotate each section? Thanks in advance!
Last reply by kiwi.at.heart, -
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Hey, I did a lab on the effect of placing identical blood samples in different concentrations of sugar solutions on the shape of RBC's. I mainly had to observe how the shape of RBC changes as a result under a microscope. I have no idea what statistics to include. I mean there is no mode, median, range or even standard deviation to include any ideas on what to include for aspects 2 and 3 of Data collection and processing? Thanks
Last reply by LikeA'13OSS, -
HI! I can't find any websites that contain option F notes. If you know any good sites can you please help me? I changed the school in the middle of the senior year and in the new school they are doing different options. I don't have problems with option E. But I don't know how to study for F. Thank you very much. Good luck on your exams!!!
Last reply by Knarik, -
- 2 replies
- 979 views
So Bio HL exams are next week The current bio syllabus is for first exams in 2009. For past papers, which year would you guys recommend to start doing from? 2006? 2007? Thanks
Last reply by Eastcoast93, -
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I did a lab on the reducing sugar content of different fruits, where i did the usual benedicts test and obtained different colours and then I tested the colors using a colorimeter. Now what im not sure of is what the results from the colorimeter actually show! Since i didnt use any known concentrations i expect that there should be a relation between the concentration of reducing sugars and the absorbance value given by the colorimeter..do you know what the values from the colorimeter show about the sugar concentration? Thanks
Last reply by LikeA'13OSS, -
- 3 replies
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Someone please heelp me So, this isn't connected to IB (not directly, but indirectly yes - I need this insect to base my investigations on) but this is my last resort and I'm really desperate. So, we're at the seaside, my family and I, and I saw this small black insect (thick, but not like a fly - thinner than a fly) which looked like a small dragonfly and it flew in a specific geometrical pattern. I would like to draw it, but I can't remember it exactly. I just know that it flew galantly like it was just gliding though the air with making no sound. Please, if anyone knew what type of an insect that was, I would be more than grateful! PS. I live in Croatia, so the cli…
Last reply by HiggsHunter,
