Biology and ESS
For Biology and Environmental Systems and Societies Discussions
1,490 topics in this forum
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Hi, I want to investigate either plant biomass growth or human memory. Which will give me better results (and marks)? I take Biology SL. Thank you
Last reply by taolangpo, -
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Hi, Today my bio teacher asked the muslim students in the class if they are allowed to touch pigs blood and if they have any objections about dissecting a pig, but he didn't ask anyone else. I don't think I could dissect a pig and still feel good about my self. So my question is: Do we have to participate in the dissection? Does the syllabus say anything about this? I will probably participate if I have to, but I would really like not to.
Last reply by Sandwich, -
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We have IA RQs due on Thursday and I want to investigate the effect of a factor on either plant growth or memory. With plant growth, I'll measure biomass; memory will consist of remembering words and their location on a page. Which is better, IBSurvival? Thank you
Last reply by taolangpo, -
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I am starting to think of bio ia topics, and my next one has to be about the human body (enzymes or people). I want to test heart rate,reaction time, or something similar on people. My teacher told me that my controls have to be really specific. I'm completely lost on how I could control factors like the subject's athletic ability. Any ideas? Thanks!
Last reply by Oreo, -
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Hi! I am asked to design a protocol diagram which shows the used protocols - most likely in a flow chart? Can someone tell what a protocol is? And in what sense?
Last reply by Noticeably Absent, -
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I am looking into purchasing a couple of books to help me with studying for IB Bio HL. I've been looking through amazon and noticed that a lot of books weren't published in 2014. I was wondering how much the syllabus has changed since 2012 and if anyone had good recommendations of IB study guides that they're currently using. Thanks in advance!
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Hi guys, for my IA, I have decided to investigate how clay soil, silt soil, and pure fertilizer can affect the rate of growth of a regular bean plant. The thing is, I'm really not sure if this is a good topic? Does this count as only changing 1 variable (soil)? My teacher Okayed the topic, but I'm having second thoughts. I'm planning to plant a total of 20 seeds, with different soils for every 5 pots. (So 5 pots clay, 5 pots silt, 5 fertilizer, and 5 regular garden soil) I'm confused as to how I should form my hypothesis also! thanks
Last reply by bobbywhite, -
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Hey guys! Thank you guys for your help
Last reply by you'llneverknow, -
IB Biology ! Difficult .....
by Guest- 6 replies
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Hey, I am studying Biology HL and i think it is extremely difficult !!! I did study really hard but I just don't know how to study effectively ......... I don't have a clue what do i need to know for the biology. Some stuffs in my test are not even in my book.( I am using the oxford biology book.) The 2014 syllabus really confuses me , it is not clear !! . I tried to find some awesome websites for biology but they are usually for the previous syllabus. I really don't know what to do. Do you know any website for studying biology? Any input will be appreciated !
Last reply by Alexis98, -
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Yo guys! I just found out that my biology topic choice for IA deadline is in two hours and I'm pretty much screwed:') the syllabus changed and since that I have no idea what could I possible investigate to fulfill the requirements and not die from boredom. I'm begging of you, fellow Ib students, for any help. Peace!
Last reply by Baller97, -
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I did a biology lab in school which had so many errors in the procedure and equipment. When doing the design lab, can I make the procedure and materials like how it is supposed to be with minimal error or do I have to write the procedure and method the wrong and error way
Last reply by ib1123, -
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Hi guys, I am wondering if a t-test is necessary to include in my IA? I have done another IA before and did not include a T-test. I am trying to measure the rate of growth of a plant. I am already calculating standard deviation and averages in my processed data. I'm not really sure what the purpose of a t-test is, which is why I'm hesitant to include in my IA. I know that standard deviation just calculates how much a number deviates from the mean right? Also, is APA the citation style to use in bio IA? Thank you so much!
Last reply by ForeverTired, -
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How did everyone else find Paper 1 and Paper 2 for the November examinations? Personally, I struggled a little in Paper 1 but felt Paper 2 went much better (if they can read my handwriting). I chose questions 2 and 3 for Paper 2.
Last reply by ESSLover, -
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I'm really overwhelmed by the tremendous amount of information in the textbook. I'm not good at memorizing stuff so most of the time I just choose the most obvious and seemingly important ones to memorize. Is it essential to memorize all the things for the final exam in May?
Last reply by CriCri, -
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For standard deviation, are you supposed to just use +/- 1 stdev or a specific standard deviation for every value in a bar and line graph? also, do you need a line of best fit in a bar graph? thank you!
Last reply by freshfaced333, -
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Hi I was writing my data collection processing part of my IA and was wondering if we have to indicate uncertainty when calculating processed averages? My raw data contains just whole numbers, if that helps. Thanks
Last reply by Lauren Johnson, -
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I was doing a biology lab and looked at my older brother's lab from 2 years ago, i used the same question as he did but did my own research and data collection as well as my own knowledge for the lab but not for the research question. I feel like I should fail, is this cheating?
Last reply by yammy10, -
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Are labs checked for plagiarism? Do I need to put it through turnitin like other subjects? If the data is shared by two people because they did an experiment together, does that constitute as plagiarism?
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Can anyone please help me out with the following question from Oxford IB course companion - 2014 edition Identify three mitochondria in the freeze-etched electron micrograph given below
Last reply by Anuja, -
Hii!! I am struggling with my biology hl internal assessments and I am in the second year of the programm :"( I've already made one design ia about chromatography and i think it was awful. I was wondering if you guys could help me with experiments i could use for my ia in neurobiology and behavior, photosynthesis or cellular respiration. THANK YOU A LOT!! :")
Last reply by puffyhair, -
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So I'm doing this lab report on Osmosis, and I've nearly finished it. However, I feel like its not going to do so well, and I want to include something that will beef up my grade. Any tips for making this a good lab report (eg. Graphs, Data processing, things to include in evaluation and conclusion etc)
Last reply by IBProcrastinator, -
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I am doing first IA for biology hl. The topic is investigating factors affecting the rooting of stem cuttings. I chose Fragipani for stem cutting and my factor is whether the cutting is placed in water or compost. I don't know how to start and what to write such as variables, research question and hypothesis. Could you please help my first IA? thank you so much!
Last reply by susanne, -
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well... It's my first year of IB and I'm taking SL bio. Right now I have a Level 3.... I know it's totally embarrassing :/ Can I bring up my mark to a level 7? or is it virtually impossible now? and I'm talking about my grade 11/ predicted grade mark, not my grade 12 Bio exam mark thanks :/
Last reply by Procrastinaterrrr, -
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My labs are overall decent however my teacher keeps telling me that my conclusion is weak and doesnt tell me how to improve it so does anyone know how to write a good conclusion?
Last reply by FaisalH, -
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My teacher says spindle fibers grow from centrioles. My book said they grew from Microtubule Organizing Centers (MTOCs). While looking for the difference between the two, I came across the term 'centrosomes'. I can't seem to understand the difference between these terms, can someone help me? Also, I'm dong the 2016 syllabus. (Just saying in case it would affect the answer in any way, although I don't see any mention of it in the syllabus.)
Last reply by Sandwich, -
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Hi, I was wondering if anyone has any summarised notes on any biology chapter as it would be super useful for revising for frequent tests due to the book being evasive at times. Also, are there any websites I can use which would give me exam questions and answers with clear explanations? Thank you in advance
Last reply by IBProcrastinator, -
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Can I have more than one dependent variable in my biology IA? like if i am manipulating concentration of nitric acid and putting it over water can i measure dissolved oxygen amount and potassium amount in sand? (That's not my IA.. just a random example..)
Last reply by susanne, -
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If someone could please explain the process of how to calculate magnification given scale bars, that would be greatly appreciated! For instance, the length of a scale bar given is 2 micrometres. When I actually measure the length of the bar, it comes to 1.8 cm. The answer is X 8500. How would I receive this answer?
Last reply by Acorn_brain, -
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to be honest, im not good at bio or interested at it.. but i study reaaly hard yet i still only got 4 in my biology SL. is there any way for me to at least get a 5? i really want to know somw way to improve my bio SL, thank u guys!
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Hi everyone, I am currently 2% away from getting a 6 in Biology SL. What are the chances I will be able to get a 6 if I request a remark? Is it worth it? Thanks
Last reply by Willy Wonka, -
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Hey guys, So, my exams were in May 2014 and I did pass but my grade in Biology is 3. I only needed 2 more points to score a 4, therefore I paid the IBO to remark the exams and guess what? no change in grades!!! so I decided to retake the exam in the upcoming november exams 2014. My teacher and I were confused about my grade! Anyways, I want to ask you is it possible to get a 5-6 or maybe 7 in Biology if my IAs are 5 ? I also heard some rumours that the november session is much harder than the one in may, is it true? If so, would the IB change their grade boundaries? I wish you a warm evening Mostafa,
Last reply by Mostafa Eldamaty, -
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If I am asked to list the functions of life carried out by all organisms (including unicellular organisms like Paramecium and Chlorella), would the tasks of the 7 functions be the same in all cells? For example, if I know that most metabolic pathways happen in the cytoplasm in Chlorella, is that fact apparent for all cells? Also, just to clarify, are prokaryotic and eukaryotic cells greater than plant and animal cells? For example, can a prokaryotic cell further specialize into a plant cell? Or are prokaryotic and eukaryotic cells completely different than plant and animal cells? Thank you.
Last reply by msingla, -
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If I am asked to list the functions of life carried out by all organisms (including unicellular organisms like Paramecium and Chlorella), would the tasks of the 7 functions be the same in all cells? For example, if I know that most metabolic pathways happen in the cytoplasm in Chlorella, is that fact apparent for all cells? Thanks.
Last reply by msingla, -
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Hey all, In second year of DP and my IA's are terrible. I would appreciate if someone with experience would be willing to look over my amylase-starch lab report. I hope its not too much to ask, but these IA's are letting me down and I'd love you if you could invest a little time to give me some feedback:) Thank you, - Phil
Last reply by Theibwatch, -
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Hi everyone, if anyone could please explain how to calculate the magnification of a scale bar that would be highly appreciated. For instance, if you are given a scale bar represented by a 2 micrometre value, and when I measured the scale bar itself it came to 1.8 cm, and the answer is X 8500, how would would actually achieve that answer? Thanks!
Last reply by Pink97, -
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In the DCP section of Biology IAs, when the raw data collected has no decimal places (eg. 5 leaves), but your average becomes 4.5 leaves...are you meant to round it up to 5 leaves then to maintain zero decimal places? Also, when doing statistical tests, one of the values I got was 0.004 - which has 3 decimal places. However, if you round it to the nearest whole number, you get 0 which isn't very meaningful. I know in physics/chem, you can use scientific notation or maintain the significant figures but I don't think it's going to work for me having my data in scientific notation (like 5 x 10^0 leaves?) Could someone please help? Thanks!
Last reply by whatislife, -
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Hey guys, I pretty much failed my experiment and have nothing to write about. I essentially tested the effect of different salt water solution concentrations on the growth of radish seeds. Unknowingly, I made the concentrations waaay too high (1%, 2%, 3%, 4%.. seriously, I made it more salty than ocean water ) and all of my seeds, except my control, failed to germinate. In the past I've had experiments that have sorta failed and it's actually made it easier to write the conclusion, but this time I feel like it's not even possible to write up anything from this lab. I don't have time to redo this experiment or attempt another one as this experiment is actually…
Last reply by Sandwich, -
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Hello. I need help with my biology IA. How to calculate the uncertainty for rate of reaction (ml/min)? i know there are two uncertainties, one for the beaker (+/- 0.05) and the other one for the stopwatch (+/- 0.01 min). Do I write both?
Last reply by anotheribkid, -
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Could someone help me decide a research question for ESS internal assessment that has something to do with horses?
Last reply by IBstudentInFinland, -
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Hey, does anyone know where I can find the syllabus for Biology HL?
Last reply by Alex The Awesome, -
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I have mock exams coming up in the next couple of weeks and could really use the practice! Am happy to trade May 2014 exams if needed, or exams from other sessions. Thank you!
Last reply by April_K, -
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So my IA involves making up saline solutions. I took 10.0mL of water and dissolved different amounts of salt grains into it, to make up different solutions, as it was my independent variable. The uncertainty for this is confusing me however. I originally was using salt concentration by weight as a percentage. What I mean by this is for example I added 0.025g of salt to 10.00mL of water, then labelled this as having 0.25% salt. I'm not sure if this is correct, and if it is, how to record the uncertainty associated with it. So I've been thinking, what if I recorded my independent variable as concentration instead of as a percentage. The concentration of salt would be 0.…
Last reply by thedudeo, -
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I am taking IB Biology Hl and I am a little worried since it is pretty hard to get a 7 even in SL. I have some questions: what is the best way to pass this subject? How much time should I spend reviewing for Biology?
Last reply by Kamen rider baron, -
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Hello! I'm writing my report on the influence of colour of light on the growth of Garden cress (Lepidium sativum). I'm investigating four colours: red, blue, green and yellow. I plan to carry out the t-test and was wondering which sets should be analysed... Do you think it's a good idea to compare them like this: blue&red, blue&green, blue&yellow, red&green, red&yellow, green&yellow??
Last reply by Patryk, -
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I just recently purchased the Biology (Study Guide) by Andrew Allott, However I did not realise that the book was designed around the 2007 syllabus of Biology. Can i still use this book even though i'm giving the 2015 exam ? Has the syllabus changed all that much ? Another question I have is regarding the attachment. Is this the correct syllabus for Biology HL ? IB_Biology_Syllabus_2_2.pdf
Last reply by neilbijlaney, -
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I really want to know tips on how to get a 7 in biology. will buying revision guides and reading them over and over again help? will making notes help? will doing all possible past papers help? i still somehow get myself to screw up the MCQs in the exams and i don't know how to get better at them, because i never have a problem with the DRQs or the Essay based questions but MCQs. Help Appreciated.
Last reply by fufufuufufufufuuu, -
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Does someone know where do i can found a method to measure the rate of photosynthesis?
Last reply by Youss, -
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Hi there, im entering IB DP next year and I just received my Bio textbook (Biology - Course Companion. Oxford University Press) by Andrew Allot and David Mindroff. Ive noticed that the content in this textbook is somewhat different than some other textbooks i have seen, notably the Cambridge Bio textbook. For example it doesnt have the statistical analysis section on error bars and stuff. Is this because the syllabus is changing or is that something our teachers will teach us without the textbook? And where can i access the Bio HL syllabus for 2014-2016? Thank you!
Last reply by Ossih, -
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Hi guys. I have a question about my IA. While listing all the materials needed for my experiment I wrote that the uncertainty of the stopwatch is ± 0.1 s. But than I calculated the rate in ml/min. Is it ok that the units of the uncertainty of the stopwatch are seconds and the rate is calculated in ml/min? should it be ml/s? Does it even matter?
Last reply by Sofia., -
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Hey everyone, I am entering the ib program next year and taking biology Hl. Do you have any suggestions on what text book/ study guide to buy for the class? Thanks
Last reply by Sandwich,
