Biology and ESS
For Biology and Environmental Systems and Societies Discussions
1,489 topics in this forum
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- 5 replies
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Suppose I had enough time in the exam (p2) to respond to 3 essay questions instead of two, would the examiner read all of them and choose the best two? Our biology teacher suggested doing this in order to maximise marks and I just wanted to double check if that's allowed.
Last reply by Drake Glau, -
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Hey, my question might be pretty straightforward but it has caused some problems doing the past papers in Bio. Is cytokinesis a part of mitosis according to syllabus? Its very confusing because some books state that it is and some that it is not. While the newer textbooks say that cytokinesis occurs AFTER the cytokinesis and it is not a part of mitosis when I did the past papers (2010 or 2009 I think) there was such a question in Papers 1 and according to the answer it actually is part of mitosis. Could anyone shine some light on the topic?
Last reply by Eastcoast93, -
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I think we have 6, i've done two - Photosynthesis (IA1) Body measurements (IA2), what are the rest?
Last reply by Jaydon, -
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I've just started the IB diploma programme and am wondering if I have made the right decision in taking SL biology over ESS. I take HL Maths, English (Lit) and Econs, and have very very very little intention of doing anything science related in future. With the "heavy" workload, SL Biology seems almost stupid to take, especially on its own since Chemistry is like the core of all sciences. However, I don't know a lot about ESS either, and how it is assessed/what the work is like, whereas I did Biology for my GCSEs (and did quite well). All I know about ESS is that it's seen as the Math Studies of the Sciences, thus seen as a "soft" subject option, and is all about the env…
Last reply by Angiegurl918, -
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Do you guys have any examples of a lab that has to do with enzymes? Photosynthesis and cellular respiration work as well, but I would prefer enzymes
Last reply by carpediem, -
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I'm just working on a lab report at the moment where I have to calculate the t-test values for a set of data... I'm looking at the lengths of the internode and leaf in the Wandering Jew plant. One set has been grown in sunlight and the other has been grown in the shade. I manually calculated it the first time and got: Internodes: -27.0879671 Leaf length: -25.25046944 But then I tried again in Excel and got a different value of... Internodes: 4.97254E-48 Leaf length: 2.26466E-44 Would anyone be able to help me with interpreting these results because I've just about given up...... Thanks in advance!
Last reply by carpediem, -
Well, my entire class is doing Human Nutrition and Health and Ecology and Conservation, but I just found it too boring to do Ecology again.. So the teacher let me pick an option since I have a high average. However, I realized later that nobody really takes that option and there isn't much available online. I found some information and made notes from it, but any additional help would be really useful. Is there anyone except me taking this option at all?
Last reply by jimbers, -
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I usually don't ask this type of question but do I have to answer DBQs in full sentences or are bullet point style sentences without linking words okay? I'm just wondering because of the tiny space that they give you to write.
Last reply by Sandwich, -
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Hi, I was wondering fortaking Ib you have to take 3 HL and 3 SL :/ I was thinking about bio HL. I want to know how hard it is. I'm actually in pre ib. But thinking ahead so any help please! Thanks P.S Ok, I'm thinking of taking chemistry HL, Bio HL. Math Sl French Sl or HL english HL or Sl these are what i've chosen do far. But I can't decide. Thanks!
Last reply by Eastcoast93, -
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Hi everyone, I'm going to do my extended essay in biology and I need some help. I would like to do something with fish, because I want to do experiment with animals and conditions which I have don't give me the possibilites to work with e.g. rats... However I don't actually know what can I investigate or what factors can influence their behaviours, growth, etc. Do you have any ideas for ee topic with fish or maybe do you know interesting webites, which can inspire me?
Last reply by ananya.agrawal95, -
Biology HL Test
by Guest Humaira- 2 replies
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so i have been studying for two weeks for my bio test which is worth 20% of my mark this year and i can't seem to remember anything i studied when i do pass exams or if i do remember anything its not enough to get full marks. any tips on how to remember info? i have 2-3 days left now before the test.
Last reply by christophertayah, -
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If I include pressure and temperature in our controlled variables, do we have to measure the temperature/pressure of the room or can we state in the procedure to make sure to leave the solutions in consistent temp./pressure/same room?
Last reply by claudika94, -
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Hi, I'm fairly new here and new to the IB. A term has passed and my Biology class has received the term to do our IA. Is the assessment rubric different to chemistry. I have a really good guide for chemistry, since they are both a group 4 subject I assume they are marked on the same rubric and are structured the same. If not please tell me. Also if any one has any tips with Group 4 IAs please tell me, I would love to know. Thank you in advance
Last reply by Sandwich, -
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Hello! Why is it called transport medium, why not just transport? what is the medium? Thank you for respond!
Last reply by HiggsHunter, -
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Could you tell me how my hypothesis sounds? Any unnecessary info/too much? Or not specific enough? Etc.. Ty! (PS. my teacher said you could have 2 hypothesis so i made two) If taro specimens are placed in a corn syrup solution which has a lower concentration of solute outside the taro cells than inside the cells (hypertonic solution), then the masses of the taro specimens will increase because water will move through the selectively permeable membranes of the taro cells from an area of low solute concentration outside the cell to an area of higher solute concentration inside the cell (along the concentration gradient) in a process called osmosis. If taro specimens are pla…
Last reply by thebest, -
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For lab reports in bio, for the uncertainty is it half the smallest unit used for measurement? For example, if I use cm and so the smallest unit is 1cm. Then is the uncertainty +/-0.5cm? Please can someone tell me how to do the uncertainties. Thx
Last reply by mariemarie, -
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Hi! I am taking Biology SL in Spanish. I have the syllabus in English, but I thought that if I could find one in spanish it would help me more to study. Then I wouldn't have to translate everything. Does anyone have a link? Or at least, how do you say syllabus in spanish? so I can google it. thanks!
Last reply by vickylebreton, -
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hi. im planning to do an experiment on how different colors of light affect photosynthesis. i will be using floating leaf disc but im not sure how to do the light. should i add food coloring in the water for red, green, blue and violet color? or would it be okay to cover the lamp with colored transparent paper? btw, do i need to include pictures in my PSOW? cuz im planning to do the experiment at home using ordinary cups. any advice would be greatly appreciated!
Last reply by Lu Xun, -
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would IB let me test in these two subjects? I know that Chemistry/Physics/Biology combinations are all acceptable but I am unaware if Biology/Env. SS. is possible in order to achieve the diploma. I really need to know for scheduling reasons with my school... thanks.
Last reply by Carpe Diem, -
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I'm sure this has been answered numerous times, but I just can't find it in the search bar, so... Are you allowed to choose your own options for the examination? My teacher selected 2 that he assumed were the easiest, and while I may agree, I want to challenge myself, and perhaps even enjoy learning about something else (I don't know why, but human physiology is so interesting)! If it is possible and I do end up studying, let's say, Option H, does the teacher/IB coordinator have to approve of it before the exam? It'd be such a hassle to do that, and I can only imagine the scene both of them would pull for my wanting to be just a bit different.
Last reply by Mahuta ♥, -
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My group and I are doing a water filter for our G4 Project. So, our filter is done already. Just, we have to figure out how to reduce the pH value of the water since the pH of the water produced is alkaline. Leaf litter seems to be a good material used in an aquarium though. So, can leaf litter reduce the pH value for our water filter?
Last reply by timtamboy63, -
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Hello, I am currently doing the biology internal assessment, and I finished an experiment but it did not support the hypothesis. Can it still be assessed? and will it hinder my final mark if I choose to include it?
Last reply by kim luffy, -
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Hello~ I'm planning to use different concentrations of lipase on cream milk, and then measure the pH (which it's supposed to get more acidic), but I'm not sure what concentrations I should use. Has anyone tried this or a similar lab before? at school we can't do a preliminary test (we have just one try) because of the limited resources, and I don't want to ruin it, so any suggestions would be appreciated, also related to the time I should leave them react . Thanks (excuse my bad english) :]
Last reply by Drake Glau, -
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Hello , I was wondering what the difference between Antigen, pathogen and antibody are? /Thanks for respond
Last reply by Sandwich, -
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Hi guys, I have this crazy bio teacher and he sent out an e.mail today for us to design a lab that we are conducting on the 9th... well this is all of the info he gave us: Design a microscopy experiment where microorganisms/cells are studied. Note: you will need to focus on ideas such as comparison between different cells, measurements, physical characteristics, special processes etc. Now I don't even have a starting idea of what on earth to do.. Grateful for all tips!!!... whoever gave me the idea of taking bio HL Thanks guys!!
Last reply by Katerine, -
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Anyone know where I can download a Pearson IB Biology Textbook free? doesn't matter whether HL or SL. Thanks!
Last reply by Cathy Li, -
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Hey guys, basically I have to make an INTERESTING presentation thats visual and rather interactive on the 9:2:11 regarding phloem translocation for my class and I really have no idea how to make it interesting. Any ideas and sites with good notes would be much appreciated - gracias!
Last reply by Emma :), -
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Hi, Ca anyone help me find a positive control for the catalase reaction lab. My negative control is: water or no potato. Thanks
Last reply by Julia Klein, -
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I am doing a IA on the effect of presence of light on the rate of photosynthesis for biology HL I took 2 leaves and put one of them in dark while the other one was under light then i measured their weights. But im not sure if this experiment is acceptable since I don't know how to process the data shell I change my experiment?
Last reply by Bad Boys of Boston, -
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Hey everyone. You all know we have to make design labs. I was wondering whether we're supposed just make the design and how we're going to do it or make the design and do the experiments, collect the data, plot the graphs, etc. A little info would be great. Thank you!
Last reply by Mahuta ♥, -
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How does one go about expressing the uncertainty of a dimensionless unit? For Example, pH: Do I just say the water has a pH of 7, +/- 1? Or is there a unit needed after the 1?
Last reply by Sandwich, -
- 3 replies
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I have an experiment in which I measure for 5 different values. I know that I should probably design in so that several trials were done for each value (5?), but as each measurement takes around 15 minutes to do, it seems a bit unrealistic to plan for an experiment that would take at least 6.5 hours; however, if I design it so that only one or two trials are made I'm worried that I'll be penalised for not having a sufficient amount of data gathered. So, how important is it to take into account the time taken for the experiment in the design?
Last reply by Sandwich, -
I investigated the differences between the ability to memorize words in a quiet environment, one involving music with lyrics and one with just a melody. My teacher said I should do the matched/paired t test, but I am a bit confused...Should I do two seperate ones? One for no music vs music with lyrics and the second one for no music vs melody? If anyone knows a link to a good guide on the t test for dummies, I would appreciate it, since I am still not sure I understand what the t test shows us... Can it be done using a calculator? Also, what other mathematical processes/tests can be applied to such data? Thanks for any kind of help!
Last reply by anne.antoinette, -
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I'm doing an IA on the effect of fertilizer on the primary productivity of an aquatic plant. I'm not good at critical thinking - that's why I didn't take IB Physics or Chem! - so I'm having a little trouble wrapping my head around a couple of concepts. Can someone please verify if I'm correct? Just tell me if I'm wrong, OK, because I need to do this IA: Primary productivity encompasses gross productivity and net productivity. (I'm pretty sure this is correct) Gross productivity: total photosynthetic production Net productivity: total photosynthetic production - respiration To calculate gross productivity in my IA: fertilizer group dissolved oxygen - dark bottle = gross…
Last reply by MT SOL, -
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I was thinking about doing a lab on how various types of music (classical, heavy metal, nature sounds, country, etc.) would affect the heart rate. My teacher thinks that I shouldn't do this lab because of the restrictions on human test subjects. She said that you can't put people in stressful situations. This is her first year and she is so overwhelmed and paranoid that IB is going to dock us points. Would IB like this lab and am I allowed to do it?
Last reply by Summer Glau, -
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I heard from my friend and saw on the wikipedia website that IB changed the course outline for 2011 or later? I don't know if it is true or not, because I don't see anything official on the IBO site. But I'm super worried because I don't know if my teacher is actually teaching things that I need to know for my exams next year. I'm using the Pearson textbook published in 2007 (which seems kind of old to me) and I'm doing a lot of lab hours. My other friend in a more experienced IB school seems to be doing a lot less labs, so I'm just wondering if anyone out there knows about this? Thanks!!
Last reply by Sandwich, -
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hi. can anyone please send me past biology papers for May 2011? i need SL papers 1,2,3 for TZ1 and TZ2 as well as the MS so i could prepare for my mock exam. i have found some papers but its incomplete. any help would be greatly appreciated
Last reply by Lu Xun, -
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Does anyone know the rough grade boundries for the IA's in Biology (I take SL) As far as I know it is a mark out of 48, including the group 4 mark too
Last reply by Sandwich, -
Are you any good with Excel?
by Guest Jar Jar D'oh!- 3 replies
- 740 views
Well my problem is that the Independent variable is always on the x-axis and the dependent on the y-axis. I find this really hard to do. So I was wondering how badly I'll be penalized for doing it the other way around?
Last reply by Slovakov, -
Interpreting t-test results
by Guest Jar Jar D'oh!- 0 replies
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My topic is " investigating the relation between wingspan and Height" I was just wondering whether I should use a one-tailed or two-tailed t-test and why?
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I'm currently designing a reaction time lab for biology and I just realized that my apparatuses are a computer and an mp3 player. Is this acceptable in terms of IB?
Last reply by Billiam, -
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Hey... Does anyone have the November 2008 TZ1 and TZ2 PAPER 1 (both question paper and markscheme)? I've tried freeexampapers.com but they don't have Nov 2008. I would be grateful if anybody could share them with me.. Thanks
Last reply by IBsurvivor2012, -
Biology IA seed lab helppp
by Guest- 4 replies
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Solution found
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I am suppose to start with my IA this week and i will appreciate some ideas on some of experiments i could do..
Last reply by The Economist, -
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What if you absolutely and completely totally bomb on an IA? Just wondering.
Last reply by Tony Stark, -
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- 755 views
Hey guys, I am new here, But i would appreciate it alot if any of you could email me any past bio IA pracs that scored decenetly as I am having trouble getting decent marks. My email is ___________
Last reply by jak8266, -
sugar solution
by Guest Juicebox- 3 replies
- 791 views
i don't understand what is for example 5% sugar solution how would I get that amount? does it depend on how much water i have?
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Hello, I have encountered one thoretical issue while writting a lab report of option about neurobiology, where we did an experiment, in which we investigated a time of a reflex. Visual was the one where we saw how a ruler is falling down and we had to carch it as fast as possible. Tactile was the one when we had our eyes closed, but we slightly felt the ruler falling and we had to catch it. Perhaps somebody did the same lab and could share their ideas about which reflex should be faster? I think that visual, but as results of some people in my class vere completely different, I'm a bit lost. Help, please
Last reply by Justina, -
- 1 reply
- 640 views
Hello everyone, I was wondering if any of you had any notes or a website explaining the statistics section. My teacher completely forgot to explain it and just basically told us what to do in excel to get the charts, without telling us their use/meaning. Thanks!
Last reply by LMaxwell, -
- 4 replies
- 720 views
Hi, I'm wondering what are the restrictions on testing on living things in IAs/EEs? Are all types of bacteria allowed?
Last reply by spereira14,
