Biology and ESS
For Biology and Environmental Systems and Societies Discussions
1,489 topics in this forum
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- 7 replies
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Hello, I'm trying to design an experiment to test for water pollution. I need some ideas about what to test for and how. any ideas?
Last reply by RBST, -
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hey, we have to do our group four projects in two weeks, we have three days during school to research everything, do the experiments, then present it on the third day.... our general topic is "energy", but does anyone have any ideas of exciting/interesting/original ideas that we could do under this topic? any suggestions would be really helpful!
Last reply by Tilia, -
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Ok so im half way throught the diploma and ive realised i might want to do something like osteopathy in the future. I currently do biology SL and i always just passed with no special grades but without really studying. Do you think i would be able to changeover? Is it a huge difference?
Last reply by miss.malhi, -
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Hi there, I'm a student thats retaking biology in four days To remind myself of the subject, I read through the biology book once, taking only rudimentary notes. Later I grabbed my higher level Oxford 2009 revision guide (+ the 2007 study guide and book for my options), and plugged pretty much every fact in there into Anki (a flashcard organising or memory programme that I may write a little about once I'm done with this whole exam thing, it's really better suited for long term learning and memorisation, but it works if you want to cram as well), and have memorised pretty much everything. My question, and my worry, is the following. Is the material in the revision guide…
Last reply by lobsta, -
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Hey I need a question for my IA in bio! It needs to revolve around ecology and messuring a species outside. ideas?
Last reply by schs0619, -
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hi, my bio IA draft is due really soon... and i need a topic for it... -sigh- i've been trying to think of some, but i cant think of anything good! my IA is on plant physiology... does anyone have any suggestions? (and it would be good if it was a fast IA...) thanks!
Last reply by Sandwich, -
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This is really difficult subject for me.. I've never got grade 4 in this subject... i always... always got 3. please tell me how i should approach this subject. what should i learn? should i buy questionbank and memorize questions? how should i understand this subject? please answer me..
Last reply by racerocks, -
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Hello all, I am currently reviewing biology for the up and coming IB diploma examinations,yet am struggling. I am not the best when it comes to biology , hence I was wondering if there were any techniques, or if anyone has any advice in regards to studying biology. I find that I initially grasp concepts, but have difficulty remembering them. What are the key topics to know for the IB papers (aside from all of them). Thank you, Pathos
Last reply by racerocks, -
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Hiya, ive come across a couple of pyramids of numbers and biomass where the producers' bar is split. Does anyone know why?? thanks for the help!
Last reply by Candlegiglia, -
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Hey all, I am writing my exams in May and trying to figure out what marks I'm going to/can get in various classes. Does anybody know what score on the Biology Labs get a 6?
Last reply by Bruce, -
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Outline the biogeographic features of nature reserves that promote the conservation of diversity (limit it to edge effects, size and habitat corridors) in school we wrote down some confusing stuff about edge effects!????... please help!? thanks!!
Last reply by bLub, -
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HI - i have a bio lap due tmr, its for a DCP (data collection and processing) the thing is its my first one & all the results are entirely qualitative! there are no numbers except the uncertainty of a graduated cylinder im really confused, how do u go about processing the data & presenting it? the sylabus says use calculations or graphs but the lab isnt made for that i was thinking of showing pictures of the results. like the colour change. any suggestions? any help is appretiated! thanx!
Last reply by Charizard, -
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Ok so I need to do average uncertainties for the data in my bio lab. But I don't know how to do this If someone could help me out I would really appreciate it!
Last reply by chipu10, -
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Hey everyone, Our teacher assigned us a design lab concerning photosynthesis. Any suggestions as to what I should test concerning photosynthesis? Thanks
Last reply by McKenzie Edwards, -
How is Bio HL? How difficult is it?
Last reply by Mahuta ♥, -
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As a method of inhibiting enzyme activity, I am testing various concentrations of CuSO4. However, I had to make these concentrations myself, and seeing as there was an uncertainty between my calculations (I had to round the amount of CuSO4+5H20 to two decimal places) and actually weighing out the amount (±0.01g), how should I calculate the uncertainty of my concentrations? In my lab report, should I mention this uncertainty, or simply just disregard it?
Last reply by Charizard, -
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I am currently doing an investigation on the effect of caffeine on the average heart rate of a boy after doing 10 minutes of exercise. Do you guys think it would work?
Last reply by aya91, -
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Hi guys, I'm a bit confused about the stages in muscle contraction... could you maybe have a look at the attached document and tell me the answer to my question (at the bottom of the document)? Thanks!! Stages in muscle contraction.doc
Last reply by bLub, -
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It would be great if you could have a look at my notes on synpatic transmission below and answer my questions... A nerve impulse reaches the end of the pre-synaptic neurone: When the axon terminal is depolarized (through Na moving in), voltage-gated calcium channels open, and calcium ions rush into the axon terminal. Inflow of calcium ions, makes vesicles of neurotransmitter move to membrane and release neurotransmitter (=Exocytose) Energy from Mitochondrion (re)form vesicles Calcium is pumped out – Neurotransmitter is broken down in the cleft (see below) and reabsorbed into vesicles Neurotransmitter diffuses across synaptic cleft and binds to receptors – when they fit, …
Last reply by bLub, -
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Is there a specific word count range for HL Biology IAs?
Last reply by Saransh, -
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Someone plz help!!! For SL Biology, we have to do a DCP lab write-up. What all do we need to include in it? Thanks!
Last reply by Jakebert, -
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I really want to buy the Biology textbook by Clegg. I've heard a lot of good reviews of it. Would you recommend it? [Hopefully what I'm about to type next is okay ^^;;;] But in Australia, it needs to be specially ordered, and it's quite pricey. So I guess, I was wondering if anyone within the Sydney area had a copy they wanted to sell? Anyway, even if there isn't I'm seriously considering to purchase it, except I don't know what the content looks like. I've been trying all over the net to try and find a sample page or two, except I haven't been able to find any. So, I was wondering if anyone knew where there is perhaps a sample page or two of the book?
Last reply by Asheee, -
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Hello, I am doing an Environmental Studies and Systems research lab/ assignementon the variations in perspectives regarding global warming in developping and developped nations. Could you please take some time out and give answers to the following questions? (in your responses, please quote the questions) NOTE: as mentioned in the title, the questionnaire is only addressed to females between the ages of 15 and 20 (inclusive). (Note: Global Warming is a phenomenon that is thought to be the cause of increasing global temperatures due to greenhouse gases.) 1) Which of the two parts of the world do you belong to? a) Developed b) Developing/ Underdeveloped 2) Are you familiar…
Last reply by Candlegiglia, -
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Our HL Bio teacher last year retired, so this year our teacher is new. I don't exactly trust what he says about things related to IB because I am not sure if he knows what he's talking about. Many times during lessons he doesn't really know. So I was wondering if I could get some advice on whether these two labs would make good IAs or not. 1. Testing Laughing and Shouting/Crying on Blood Pressure: Basically I was going to find audio clips of people laughing and of people crying. I would have 2 groups, one for laughing, one for crying. I would test their regular blood pressure first, and then test it after they have listened to the clips, and see if there's a difference.…
Last reply by ABC123456, -
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what organelle would be numerous inside your mouth? I think it's either the lysosome or golgi
Last reply by Mahuta ♥, -
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Help would be appreciated.
Last reply by Mahuta ♥, -
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Is this a good Biology HL Internal Assessment lab? I am nearly done with it and I just realized that I misread my teacher's handout. It said Effects of Solutes and the Cohesion of Water, but it also said something about boiling point. So I did an experiment testing Temperature vs. Water Cohesion! I think he gave us this sheet as a guide to some ideas, but I'm afraid I have done a lab that doesn't really qualify as a good lab!
Last reply by Mahuta ♥, -
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Hey ya'll, So our teacher assigned a lab write up and i have the raw data, but I was absent the day he assigned and discussed the lab write up, could someone help me with a link or telling me what I need to write??? Hyped up on caffein, Thanks!!!
Last reply by Sonneteer_Trombonist, -
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My teacher said the for Internal Assessments, we have to have a diagram of the experiment that's labeled and everything. My question is can this be hand-drawn and hand-labeled?
Last reply by Sonneteer_Trombonist, -
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My teacher has suggested this following lab as one of our IAs. A lot of us are doubting if it will be seen as a good IA idea in the eyes of IB, probably because it seems so simple. The idea is to test the effect of a solute or solutes on the surface tension of water. I think we intend to test it by using droppers and drop water onto a coin surface until the water tension breaks. This sounds so simple; is it even a valid lab?
Last reply by ABC123456, -
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I know it's kind of skewed to ask this question on here because I feel like everyone is a genius. =) So what did you get for HL Bio? Is it hard to achieve a 4 in it? I'm wondering because there's 3 months until my HL Bio Exam and I am scared I will not pass. Yikes.
Last reply by helpme08, -
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I really need help with my group 4 project. My class' projects had to involve a nearby river. My partner and I decided that we would take soil samples from the river itself and some from the surrounding area. Then we planned to grow 5 plants in each type of soil and see which supported life better by measuring biomasses before and after. Unfortunately, due to recent flooding in the area, the soil was a bit messed up: our samples from within the river turned into clay in about 3 weeks and the samples from the surrounding area were sand. Needless to say, the plants from the sand died in about 2 weeks and the plants from the clay died in about a month and a half. We basical…
Last reply by thatguy, -
Biology IA
by rdc17- 2 replies
- 4.4k views
So I did my Biology IA experiment on an invertebrate, and I tested a taxis (movement away from/towards a stimulus). The experiment worked well, and I got good data. However, now that I am writing it up I am having trouble. How can I do a statistical analysis if the only data I have is the number of organisms in each choice chamber at the end of 5 minutes. e.g. I have for trial 1: 4 in light, 6 in dark trial 2: 3 light, 7 dark etc. How can I analyze this data statistically? My teacher said IB really like line graphs, but I can't see how it would be possible for me to make one for this experiment.. thoughts? Thanks for any help!
Last reply by Mahuta ♥, -
- 3 replies
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For my IA I'm investigating the effect of differing light intensities on the rate of photosynthesis on corn plants. I was thinking of planting the plants, controlling all variables while waiting for them to sprout out of the soil, then apply the light. To do light intensity, I thought of buying a lamp or lamps and putting different watts of bulbs, like 5 10 15 and attaching a timer that would go on at the sunrise and sunset predicted for each day. Should the lights be flourescent? And would it be a more appropriate approach to change the distance of the light from the plant rather than the watts? Any other advice is welcome!
Last reply by bescherelle, -
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So for my photosynthesis lab I was thinking of measuring the affect that the concentration of chlorophyll has on plant growth. Liquid chlorophyll is up for sale because it's apparently a really good natural health remedy so I was thinking of putting that into the water or something. Is this a good idea? Otherwise, I was thinking of just doing concentration of salt in water in the Elodea plants, but will that score me good marks? It's one of the most generic topics I think. Thanks.
Last reply by godofib, -
- 3 replies
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OK, so I'm a tad confused as to how all our Bio pracs are assessed. I'm aware we have to complete 60 hours of practical over the two years, not all assessed, but do we have to hand all the non-assessed ones in for a mark? Only I'm sure some of my non-assessed just consisted of computer database searches and what-not, and I am also sure not all of my non-assessed sheets have been handed in to my tutor. Does this affect me a lot, as an individual, or does my tutor only need a few examples from some students to prove the full 60 hours have been done? Are the 60 hours monitored over the whole class, or for each student individually? Also, I know that 3 examples of assessed…
Last reply by sweetnsimple786, -
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We learned about like relative and absolute uncertainties in chem, is that what we're supposed to do? I'm not sure exactly how this part works, or how you would present it. Also, are tables necessary for IB labs? My data is alot easier to read on a graph, but I'm not sure if I should include the tables anyways. Help?
Last reply by sweetnsimple786, -
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So I've basically completed my IA for Bio, but I don't know how to make it better. I have all of the guidelines, but can anyone help specifically on anything about it? Even if it only gets me one more mark, I would gladly take suggestions!! thanks!
Last reply by Bishup, -
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Okay i have my experiment. effect of temperature on the amount of oxygen bubbles evolved from respiration of elodea. I used 10,20,30 and 40 degrees to use for my experiment. qeustion in data processing, how to measure the rate of photosynthesis ?
Last reply by Austin Glau, -
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Okay so i am a Biology HL student. im doing a lab report about investigating microorganisms. I will be investigating different glucose concentrations on the rate of CO2 gas evolved in the respiration of yeast at time intervals. that is my aim. and i will measure the co2 evolved by a ruler, i will see the level of it in a test tube and take in cm its length. but i dont know what to do in my data processing part... any help ??? Thankss !
Last reply by Sandwich, -
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For Grade 11 IB Bio...first internal assessment is a lab on osmosis using the egg with it's shell removed from vinegar. What are some interesting questions that I could use to design my lab around? Anything I think of seems really boring or typical, and rather easy. Any ideas?
Last reply by KiwiBee, -
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Hello Everyone. i am doing my Germination design lab report and im a bit struggling and stuck on the Data processing part! what other calculations can i perform other than calulcating the ratio and my design is about: The effect of light on seed germination. I placed seeds in the drawer. some on the bench left to the light of the lab, and some under a light bulb, i counted how many seeds germinate each day and toom a ratio, but i feel its about weak, can anyone help me? Thanks !!
Last reply by hanz, -
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I've got an urgent question. Presence of starch in various specimens can be revealed by adding Lugol's solution to them. It (potassium iodide if I'm not wrong) reacts somehow with starch (actually how?) and turns the specimen dark blue. Now, the question is wheather this reaction is reversible or not? I mean if I add saliva (which contains an enzyme amylase decomposing starch) to a starch specimen (e.g. a piece of a potato) treated with Lugol's, will it still decompose the starch (and thus make the blue colour disappear) or will starch structure be distorted by Lugol's so that the amylase won't work? Any help would be appreciated.
Last reply by The Cheshire Cat, -
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I need the criteria for the "Data Collection and Processing" & the "Discussion, evaluation and conclusion" parts of the portfolio. I already have the information for the marking scheme shown below (only for the full marks in each aspect), but I want to know the actual criteria; such as what i need to actually do in these sections, etc. DATA COLLECTION AND PROCESSING Aspect 1 -> Recording Data /Complete Systematically records appropriate quantitative and/or qualitative data (raw or secondary), including units. Aspect 2 -> Processing Data /Complete Processes primary and/or secondary data correctly. Aspect 3 -> Presenting Processed Data /Complete Presents proces…
Last reply by asdqwe123, -
- 1 reply
- 943 views
I've got to write a Design part of Lab Report, mainly come up with a research on proteins. Of course it's got to obey all these rules you know like being realistic and possible to conduct in a school lab. It seems quite simple (proteins, denaturation, eggs, blah, blah) but when it comes down to it I can't think of anything good. I'd appreciate your help, maybe someone has already done sth like that?
Last reply by sweetnsimple786, -
- 2 replies
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I was wondering about how exactly the IA lab component works for Biology HL. According to my teacher, our IA mark, other than the 6% that will come from Group 4 and manipulative skills, will apparently comprise of our two best labs. These labs will then be up for moderation. However, what I've discerned from my chem class is that our best marks from each section (DE, DCP and CE) will be submitted as our IA marks as opposed to the complete labs themselves. For example, if I got 6/6 on DCP for one lab but I got 5/6 on the CE section and then for another lab I got 5/6 on DCP but 6/6 on CE, then for my IA marks, I could simply use the best marks for each section out of all th…
Last reply by deissi, -
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Is not explaining what a piece of obscure lab equipment is a problem with IA examiners? My teacher told me I didn't give enough information about what a spectrophotometer is. I admit I didn't give any information, and that it isn't common knowledge, but will an IB examiner deduct points for something like that?
Last reply by Chelleee, -
- 1 reply
- 1.4k views
The SL & HL Biology options have already been chosen for us, yet I really wanted to do different ones, therefore I've arranged with my teacher that I will not attend class when we're learning the set options and rather I'll just learn the options I want to do by myself. Has anyone else done this that you know of?
Last reply by Sandwich, -
- 3 replies
- 797 views
We currently got a new HL Biology teacher, because our old teacher retired. Actually all of the biology teachers in our IB program left due to various reasons. Us HL Biology students have been feeling really iffy towards our new teacher, because he doesn't seem to have a structure to his class or doesn't know what he's talking about. Anyways, Can anyone tell me or send me a link to where I can find out all the requirements needed to pass HL Biology? Mostly the Topics that we must cover for the IB Exam and how the IA works. I just want to make sure everything is on track. We're all quite worried.
Last reply by sweetnsimple786, -
- 3 replies
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I am using data loggers for my EE to test the amount of carbon dioxide produced in germination. I have four carbon dioxide sensor. When I have all four on, three of it says that the carbon dioxide concentration in ppm is 322718 whereas one of the carbon dioxide states that the ppm is 2000. Which one should I believe and why are they different? is the setting wrong. Please help very urgent. Please help me resolve this problem. I have tried a lot of things
Last reply by Sandwich,
