Biology and ESS
For Biology and Environmental Systems and Societies Discussions
1,489 topics in this forum
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So my Bio final is in the first week of june so I wanted to start studying now for them. Any tips on how I should study> For bio or just in general for finals week.
Last reply by Schrodinger's CAS, -
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Hello everyone! So for my biology IA I intend on investigating the effect of cigarette smoke on plant growth. I will be exposing plants to filtered/unfiltered cigarettes over prolonged periods of time and periodically measuring their growth. What do you think of this idea? Will it be successful and good at getting me a high mark? I have back up ideas which are investigating the effect of acid rain on plants (using vinegar to lower pH of water of plants), or effect of overpopulation on plant growth (by planting a lot of seeds in a certain area). Thank you for your feedback
Last reply by ellie, -
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Hi guys, So I was just wondering if anyone might have some useful tips when approaching the data response questions? The data response questions ALWAYS pull my average down as I was bound to get at least one question wrong... I know that the 'best' way to tackle data analysis questions is simply to do loads of them for practice, but might there be more time-efficient ways? Thank youuuu
Last reply by ShootingStar16, -
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Since it is almost the end of summer, a lot of us are busy with Ia and exams. This video is pretty useful in telling the structure and content http://bit.ly/1c6lV2e
Last reply by calvinlui, -
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Hi people We are learning the heart structure and soon we have an exam and then our end-of-year exam. Can someone provide me with a heart sketch that is good according to the new syllabus for HL? Thanks in advance
Last reply by Antonia Julia, -
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My biology internal assessment is on "The effect of different hydrogen peroxide concentrations of different types of yeast catalase" As hydrogen peroxide concentration increases, the rate of reaction of yeast catalase will increase. However, eventually yeast catalase will become saturated, as it has reached its maximum rate possible. This means that increasing the substrate concentration will no longer effect the rate of enzyme activity. In this case, the rate of enzyme activity will stop, and it might eventually decrease. ^ That is my hypothesis for it. And for those who have had previous experiences with the biology IA, can you please tell me whether my hypothesis…
Last reply by Selikem, -
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Hi! I was wondering does ib ever ask defintions outside the ones they ask for in the syllabus?
Last reply by ChocolateandIB, -
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Hey guys, my teacher is expecting us to find a topic for our IAs. My idea is to investigate osmosis rate of Eggshell membrane. Basically, I will put a raw egg into vinegar so the egg shell itself will dissolve and then put the raw egg into sucrose solutions with different concentrations. I talked to my teacher today (he's pretty strict and expects a lot) and he said that my idea basically sucks because I can't calculate the osmotic pressure and the osmosis rate will also be hard to measure. My other idea is using Edolea plants and investigate their rate photosynthesis and changing factors like light intensity or different colours of light. When I told my teacher howev…
Last reply by Emilia1320, -
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Like if someone did an experiment on something, would I be allowed to use that topic but do my own experiment? (Biology HL)
Last reply by IbTrojan, -
Ok so the question might sound quite confusing but I'll explain. I get somewhat worried when I am studying a concept in biology from textbook, and the wording of that concept from the textbook will not match up too well with the mark scheme for a particular question. It's never actually happened to me yet in an internal school exam because we have access to questionbank and I normally study using those markschemes, but I often see situations where if I didn't have the access to the mark schemes, and I learnt a concept entirely from a textbook, that I would end up getting maybe 6/8 for a particular question, even if what I wrote was word-for-word from the textbook. …
Last reply by anotheribkid, -
Hey fellow bio students, Does anyone know if we need to be able to draw the eye and ear for option E on paper 3? On bioninja it says that we only need to label, but have looked at some past paper 3s that were perhaps 4-5 years old that asked you draw them. http://www.ib.bioninja.com.au/options/option-e-neurobiology-and-2/e2-perception-of-stimuli.html Thank you
Last reply by Husam Abu Ghazaleh, -
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Hey guys, I was wondering if someone could give me a good answer to this question: Describe the role of isolation in natural selection Thanks!
Last reply by IbTrojan, -
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Are the bio options tested in paper 2 for IB HL BIOLOGY candidates? I am not sure and I don't recall my teacher talking about it
Last reply by freshfaced333, -
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I am currently in the middle of my revision for Biology HL, and am struggling with Paper 3. My school taught Option G and Option H. However, Option H is very tough one and I am having big troubles learning and understanding it. My Questions: If Option H should be to much/difficult, would I be allowed to study another Option, that I am generally more interested and better in? Will all Options be available in the exam? Or will I only get the ones, my school taught in the class (Did the school sign me up for specific options?) Thanks
Last reply by fs8085, -
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Hey guys What questions do you expect to come in the Biology or Chemistry exams this May?
Last reply by Youss, -
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Hey Guys! So I am doing this lab report about a lab I conducted last week. In the instructions it said "You could have uncertainties as well". But I've never come across something called "Uncertainties". What do they want me to do? I've googled it and I haven't found anything useful Thanks in advance MajorProcrastinator
Last reply by Slovakov, -
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for students that have already taken the IB BIo exams, were there any special exam procedures you had to do? Did you have to fill out special things in your tests? My teacher says that he is going to go through what we have to do on the day of the exam, like special things we have to fill out on the test sheets and what not, and I am wondering if there really is special things we need to do, or can we just simply turn up and write our exams? I'm asking because if there is no special procedure, I would rather spend my time studying at home than going to school thanks!
Last reply by freshfaced333, -
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Hi, I have a really urgent question about HL biology (because exams are in a week). I'm in Bio HL, and my teacher told us that we will be tested on every single unit in the entire textbook on the exam. If this is some kind of like motivational thing to get us to study, it's fine. But honestly he walked in today and told us that we haven't done like 5 of the units because our optional units were D and E and apparently we were supposed to have done A-C as well as the D and E (because we're HL and we have to do all the mandatory SL units too???) I've googled this and nothing has shown anything totally solid. Like I love bio and I don't mind really the entire textbook,…
Last reply by Terminator, -
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So, my teacher hasn't been very helpful these past years. Maybe Wednesday last, he tells us that we will have to self-teach option F. We haven't covered much of anything in that option, and I find it difficult because of so much memorization. Do you all think it would be better for me to self-teach an option we know more of (evolution), or just stick to what he says we should do? Either way, I don't think I'll be anywhere near prepared enough, so I'd like to know which seems to be easier to you all. Thanks!
Last reply by bakri_halim, -
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Hey all! I have a question on scale calculations for scientific diagrams. In my classroom, we used a calibrated reticule to measure a cell length, lets say a value of 1.234mm If my diagram length was 12.34cm, what precision do I use? Scale for the assignment is to be shown as size of diagram:size of object in cm : micrometers In this example the final scale value as 1.00cm= 10.00 micrometers after calculating scale: (1.234mm) / ( 123.40mm) = 0.01000mm x 1000 = 10.00 micrometers ->> 10.00 micrometers follows sig figs, however, is not the measured precision of the reticule at 0.001mm. So my question is, are these precisions of decimal places correct? And d…
Last reply by Baller97, -
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What happens if we do? Do we get marks deducted or do they just mark the first two? My teacher tells me they mark them all and then use the two best scores as my Section B grade. I doubt they would even bother marking more than two considering they have more than just one paper to mark.
Last reply by susanne, -
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Hi. I am doing my first IA but I am having lots of difficulties..... My research question is How do different levels of pH (level 2 and 9) affect the activity of amylase?. However, my school is not providing amylase so what is the easiest way to get amylase for the experiment? and how do I have to write variables and personal engagement?
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I know people in here are not very fond of helping coming up with a RQ but I seriously need your help guys. My mum have been very, very sick for the fast few weeks so I am severly behind in school and got my mocks coming up in 3 weeks and after that we need to do the experiments for our Bio IA. Anyways: My plan was to do something on Parksinson's and Genetics so I came in contact with a researcher at Karolinska Institute who is leading a research group in finding out if Parkinson's disease is heritable. So - she offered me access to her lab which means I have access to all I need for doing genetic research, DNA of patients with and without parkinsons and ofcourse …
Last reply by susanne, -
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My school did option E and H. I'm okay with E but H is a huge struggle for me. I could get a 3 instead of 4 or 5 just because of it. I'd like to ask if it possible for us to choose to do other option that we didn't cover in class? Would that be a problem if i choose to do so and self-study that option?
Last reply by ibprincess, -
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So I have my bio IA topic figured out and I want to do it on the correlation between the number of melanoma cases in European countries and the distribution of blue-eyed people for each of the countries I'm looking at. I found a database for the number of melanoma cases and I'm doing this because I read an interesting article that suggested that there was a possible link between eye pigmentation and the risk of developing melanoma. Problem is: I can't seem to find a credible database that has stats on things like the distribution of eye colour. Anyone here know of any good, free databases that have that? Thanks!
Last reply by ShootingStar16, -
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I'd like to finally clear up some confusion on chromosomes...I think I understand but I get a lot of questions because I'm getting one of the best marks and I'd like to give solid answers Basically plz check if I'm right- Chromatin - spaghetti looking mess of DNA when not in mitosis (interphase) Chromosome - a dot (centromere) and 2 lines, I shape Chromosome (after S phase) - a dot and 4 lines, X shape Sister chromatids (after S phase) - a dot and 4 lines, X shape [sister] chromatid (after S phase) - a dot and 2 lines, I shape In a karyogram, it's showing a pair of X shaped chromosomes. Is that what it looks like after S phase, because after meisosis a "dot…
Last reply by NiCKEL, -
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Exactly as title. Book doesn't give me much on anaerobic respiration...
Last reply by Emilia1320, -
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Exactly the title. Guess here's when wikipedia f**ks up...on their Cyclin A page it says "degradation of Cyclin A/CDK1 induces mitotic exit" while on the Cyclin B page it says "in order for the cell to progress out of mitosis, degradation of cyclin B is necessary" And it says B/CDK1 replaces A/CDK1 so I doubt they both degrade at the same time
Last reply by NiCKEL, -
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Hello, I really want to get at least a 5 in bio test. But Im still confused about the Options. We covered two HL Options and havent studied the rest of the options. Will the test contain questions from the SL Topics, Hl Topics and the two options that we covered? Considering the time left till the exam, do you think it would be wise to study from online sources or the book ? I already covered 3 chapters from the book
Last reply by ShootingStar16, -
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How can I conquer this part? I need to type it up, and I was just wondering, for those who already did this, and for those who know, what should I include?
Last reply by IbTrojan, -
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I'm typing up my biology IA, and when I looked through some examples of biology IA's online, I found that some people had this as part of their IA... I didnt really get the hang of it and I would like to know what is it? And how can I use it for my results?
Last reply by Slovakov, -
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when one of the assessment statements starts in biology starts with "Stay that [guard cells can regulate transpiration by opening and closing stomata]", do we have to give an explanation or it is enough with stating it? thank you
Last reply by beatriz, -
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Hello all! I'm currently a junior and have my remaining classes planned out. But due to a packed schedule and my desire to take an additional science class during senior year (which is optional in my school), I've opted to take Biology at the higher level instead of having to take an IB elective course. The bio teacher in my school in certified to teach SL, but does he need a separate certification in order to teach HL? Have any of you chosen this route instead of taking an IB elective? Apologies if this topic was posted in the wrong forum!
Last reply by biotonic, -
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Nature tends towards disorder... but are IB markers aware of that fact? Nah seriously. My random error is actually really small but my equipment error reaches the 35% & it is because the pH meters were incredible ****ty & they fluctuated a LOT. Can I just point it out as a limitation or there is no way I can present an experiment with that biiiig error? Thank you
Last reply by IbTrojan, -
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I am suppose to choose my subject for next year in IB. I am planning to take Medicine as my career and i plan to study in the UK. COULD ANY IB STUDENT THE SIMILAR SUBJECTS GIVE ME SOME ADVICE. Math HL Business HL Chem HL Bio HL Lang and Lit SL Spanish Ab intio HL PLEASE COULD ANY GIVE SOME ADVICE ON WHICH SUBJECTS TO TAKE OR NOT THANKS
Last reply by Abood_Ahmad, -
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I am suppose to choose my subject for next year in IB. I am planning to take Medicine as my career and i plan to study in the UK. COULD ANY IB STUDENT THE SIMILAR SUBJECTS GIVE ME SOME ADVICE. Math HL Business HL Chem HL Bio HL Lang and Lit SL Spanish Ab intio HL PLEASE COULD ANY GIVE SOME ADVICE ON WHICH SUBJECTS TO TAKE OR NOT THANKS
Last reply by biotonic, -
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My first draft is due sunday(where I live, the school week starts sunday) So basically heres the deal, I found my experiment online. I used the same methodology, materials, and everything. To personalize the experiment, I did change a few things in the experiment(like using different types of yeast, instead of one type of yeast as stated in the experiment i found) and using different concentrations of the independent variable(which is hydrogen peroxide) compared to the ones stated. I did mention that in my 'personal engagement' section of the I.A. (Or I guess it used to be called 'background information' before this year) Is that good enough??????? Or can this pose a pr…
Last reply by IbTrojan, -
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Investigation on Dionaea muscipula sensitivity : How does different PH value affect the rate Dionaea muscipula's movement after being stimulated? *Dionaea muscipula is just a plant. I dont think how to rephrase the EE topic. Any suggestion? Is it too board.
Last reply by Baller97, -
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My ideа for my Bio IРtopic is water putification. Is it bio enough? Or is it more of a chem topic? How do I relate it more to biology?
Last reply by olenap, -
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I mean, for my EE. I have to change the light intensity. And I am gonna change height between the light and the object, thus the intensity changes. However, the thing is I dont know how to increase or decrease the height of the light source and the object. \ any suggestions?
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so I have my end of year bio exam and its on the entire year, I'm a little scared as the exams are in the end of may, what would be be the best way to prepare as it is a lot of information
Last reply by King112, -
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Hey guys! I am new to this forum, and I only created an account because I really need this question answered ASAP. I don't really know where to categorise this post, so I put it in the "Biology" section because that is the current topic that I need assistance on, so please pardon me if I have made a mistake regarding where to post this thread. I am doing a "Impacts of Science" presentation about Desertification, and scientific solutions to solve it. Since my teacher emphasised a lot on the fact that the solution has to be a Scientific Solution, I am afraid my current solution does not qualify as a scientific one. Here is my solution : In order to halt and reverse desert…
Last reply by SilverArc, -
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Hi, I have run into somewhat of a problem. We are supposed to hand in all ESS reports and fill out a form called PSOW where we list all experiments conducted and list the hours spent on each experiment. This has to add up to 42 hours it seems like. Me, being somewhat of a procrastinator, and having an ESS teacher that's not very aware of how everything in the IB works, I need help from someone here. I have not done all of these reports, and I will not be able to finish them within the deadline set by the teacher to hand in the form. What does this mean? Will I fail the course? I am getting 5's in ESS mocks, if that is relevant at all. Also, I am pretty behind in the biol…
Last reply by Kjetil Carelius Brustad, -
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I think I did a very bad job. I did my IA on sugar acting as an inhibitor for lactase, and did my experiment, but the data was crap. So I did more research on lactase inhibition of sugar but I found nothing. Is there anyone who can offer some help for this? Does anyone have any articles for lactase inhibition of sugar? Or did I screw up my IA?
Last reply by susanne, -
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Can someone please explain how the absorbance readings at 260nm be analyzed? I know that the readings at 260nm determines the concentration of DNA, but I'm not sure how to interpret the values I got? I got the values ranging from 20 µg/ml to 120 µg/ml.
Last reply by susanne, -
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I've recently started studying for my Biology exam in May (I know, late to the party) and I would like some help on which resource it would be best to use. As I don't have a lot of time, since I also have to study for my other exams, I decided on using either BioNinja or IB Guides, instead of the book, as the information is a lot more to the point in these two. The question is, which one of the two would if be best to use? I've found that the two guides are sometimes contradicting as to what you should know to answer the question right. I'm currently studying Prokaryotic & Eukaryotic cells and, as you can see, the information that they give is quite different, espec…
Last reply by susanne, -
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Do we need to compare our results to literature values? Because I can't find any literature values for my experiment
Last reply by susanne, -
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Hello, I'm currently doing IB ESS this year and I'm struggling to apply the concepts in tests.. I'm not a science student at all, and I've taken this subject thinking it would be more fun and more logical than doing Biology, Physics, Chemistry (You know.. all the general sciences).. I'm struggling to apply these theories into ESS tests.. How should I revise for this subject? I have my mocks coming up in two months.. I've had 5 tests in this subject so far.. the teacher goes through every booklet with the syllabus content so quick.. I'll have to rely on self-studying.. but the thing is.. i don't know how to revise.. I'm really bad at this subject (well I think I am at …
Last reply by Echowave, -
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Hey I'm in IB ESS and I am Creating a Survey IA it would be helpful if you guys could take it. Thanks, Matt https://docs.google.com/forms/d/1nK59Qty8X0v9PtciTUGjV2RYPGHJPGEQ4NBIA84uaXs/viewform?usp=send_form
Last reply by Matt Austin, -
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I've been looking for tips for this subject. For example: How to get above 5 in ESS when you don't even understand what you're teacher is talking about in class. And yes, I am that desperate. Help, please. HELP. So, please, any tips for ESS. This topic is open for everyone who took ESS for their group 3.
Last reply by Manasvi Patel,
