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Found 750 results

  1. Grade 10 bio notes for beginners.
  2. lella02

    IB Bio EE

    Hi all! I am in the process of deciding an EE topic. I have come up with a possible topic but upon discussing with my teacher she has told me that it does not have enough depth for IB diploma and lacks a biochemistry angle. My proposed topic is: The regeneration of Planaria Researching whether freshwater Planarian (flatworms) reproduce asexually by regeneration and what factors affect its ability to regenerate. Essentially, Planarians possess neoblasts (pluripotent adult stem cells) which have the ability to transform into a huge range of cells that are able to maintain and regenerate. I will be cutting planarian into segments, ranging in size. I will also research some other factors that may affect its ability to regenerate and incorporate those factors into my experiment. There is a lot missing from this and I am hoping to research and develop this more, but for now, I am stuck. My question is, how can I make this experiment more "IB-like?" and does there need to be biochemistry involved in these topics? Or is it because my teacher prefers us to focus on biochemistry because it is all we have learnt in IB Bio so far?
  3. Hi, guys. I am currently having a bit of trouble figuring out how to control oxygen concentration for the yeast and measure rate of respiration (based on carbon dioxide gas production) at the same time. If you have any ideas, please suggest how I could do this? I have never worked with oxygen before or tried adding a gas while measuring another. My biology teacher has told me that physically it may be difficult... But I feel like this is 10000x better than doing sucrose concentration. I have a few ideas such as isolating the yeast in a container with a specific oxygen concentration and having an aspirator/vacuum pump come out of it somehow for the carbon dioxide to be captured but I'm not sure how practical this is. In addition to that, how do I go about finding 'the best' oxygen concentrations for yeast? Do I just find the minimum oxygen concentration needed and then use values significantly higher/lower than that? I've researched that there's a point where that respiration will stop occurring in yeast if the oxygen concentration is too high. I was just wondering how I could go about finding this range/value. In addition to the above point, if this seems too difficult/impractical should I change my dependent variable? Should I measure the rate of respiration by the presence of another variable? Thanks, imperialbee
  4. I’m trying to decide the subjects to pick for my IB studies next year. Biology and chemistry hl have already been decided as I’m trying to get into medicine. My current placeholder of a choice is studying psychology hl, maths sl, and language A lang and lit, and ab initio Arabic (on top of bio and chem hl). I honestly don’t know if it’s a good idea to study three sciences (yes, I’m counting psychology) at hl! I didn’t get to study psychology during my middle years as my school didn’t offer the subject, but I’m really interested in the subject. Am I setting myself up for misery and anxiety ridden nights before and after the exams or is the combination that I’ve currently chosen feasible enough? And by the way, does an ab initio second language count as an SL subject and bear the same grading weights or am I supposed to study an extra subject??
  5. I seriously consider my Biology SL classes useless to get prepared for the IB exams. My teacher is not following the IB material, and I feel like I am wasting my time here. I am in the last 2 months of my Junior year. My IB exams are going to be in May 2019, so I guess I still have time, but I am worried day and night. Can somebody give me some tips to study IB Biology on my own? How can I get prepared to get the 7?
  6. Hello, I was wondering what counts in the word count for a biology EE, does calculation, table titles, headings, appendix, etc count?
  7. Hello everyone i need help on my biology ib my question is Does the diameter of hair change according to the hair dye colour utilised on it i have no idea what to do pls help thanks
  8. Hey everyone, According to the IB biology guide for exams commencing in 2016 onwards, it states in 5.3 that: "Application: Recognition features of bryophyta, filicinophyta, coniferophyta and angiospermophyta." There is no mention of requiring recognition features of animal phyla. However, my bio book by Cambridge University press (printed in 2015) and bioninja still has information on recognizing animal phyla. Could anyone here reconfirm this? Have you guys learned about animal phyla? Thank you!
  9. Hi all, I just wanted to know how difficult it's going to be for me to study and succeed in IB. I'm currently studying in grade 10 and I'll most probably start studying according to IB's curriculum next year. I'm currently studying the Holt McDougal Modern Chemistry, English Literature/writing, Biology, and Phyiscs. The McGraw Hill Algebra 2 on top of social studies, Farsi literature/writing and Arabic. I find all of the subjects I'm studying relatively easy (except Farsi. Even though it's my mother language), and I aced all of my finals last term. But I'm kinda stressed to be studying IB as I have no idea about the difficulty level. The hl subjects that I'm gonna pick are biology, chemistry, Farsi and English (I have no idea whether it's gonna be A or B; it's mandatory to study Farsi and English hl at my school) I want to study medicine and I looked at dozens of university admission requirements for the said course; most of the universities I'm interested in require a minimum of 6 in bio hl and chem hl on top of an overall score of 38/45. As I said, I just want to know how much energy I'll need to exert on my studies and how difficult it'll be to meet the mentioned requirements. Your insight would be appreciated! Edit: Do I need to study physics as wrll to get into medicine? I'm already picking Math sl so not sure how that'll work.
  10. Hi...I'm in a bit of a dilemma. I know I'm going to be studying sciences in university, but I'm not exactly sure what type of science I'm getting into. It's a bit stressful because I have my own preferences, while my parents' disagreement with these preferences make me scared to the bone. I know I want to take Chemistry at Higher Level, but my problem is between biology and physics (+ computer science, but I'd rather NOT get into that.) at HL. You see, I'm studying MYP right now and so far I really enjoy Biology and find it very interesting. As discussed with my careers counsellor, I could take my bachelor in Bio OR Chem and then take my Masters in Biochemistry, which I thought was a great idea because it is two subjects I enjoy (to a certain extent, but I'd also rather NOT get into that). My parents don't think that's a great idea though. My dad says I'm limiting myself wayyyyyyyyy too much (like a mouse hole kind of too much) if I delve straight into my masters after my bachelor. Sure, I get that. Maybe I'll work with my bachelor in Chem for a while. But that's also very limiting, apparently, and my only option is to take Chemistry and Physics/Computer science to get a bachelor in engineering. Except I dread Physics/ I'm not-so-great at it. And I've heard it's a death wish to take it at HL if I'm not ready to put in the effort or enjoy it to the fullest. News Flash: I'm not! (As for computer science, well, I'm not very sure because I've never studied it, but I'd assume I wouldn't be fascinated by the unduly amount of numbers and problem solving that seems to give high-paying jobs all around). The thing is, I'm not going to get into medicine. Not a doctor or radiologist or pharmacist. And Biology is practically a dead end to my parents, very shameful, if I don't want to be a doctor (which, I repeat, I DO NOT). I'm trying to cooperate with my parents by going into sciences (trust me, it's not my first choice), but I'd like to at least do something I like (to some certain extent). However, it seems like unless I get into computer science or Physics (engineering, really, is assumed to be the only job that'll get you some bucks here), I won't be successful. I've been told it's best to cry now and not later, but I'm not sure if that's necessarily true. I think if I take Physics and end up being an engineer I'll be crying 'til the rest of my days. But, at the same time, why should I trust myself? I'm a kid and puberty and hormones and total ignorance makes me rethink my choices in taking Chemistry and Biology at HL. Should I just take Physics and Chemistry and cry in a Ferrari? Sorry for the rambling. I appreciate any and all responses.
  11. Okay, so our biology teacher is a noob and we need help. She doesn't know what she's doing at all. She gives us the same tests that she gives her standard biology classes and we haven't covered the whole book at all. What do I do? I know for a fact that whatever she does won't help. So how do I save myself? What can I do to teach myself one of my least favorite subject? Please help me. I am dying and I don't want to fail.
  12. Hello does anyone know where I can find a stress inducing test like a mental arithmetic test or a Montreal Imaging Stress Task that works and is free? Thanks
  13. I am doing my extended essay on the comparison of different eating habits (vegan, vegetarians and meat eaters) and discussing the controversial topic of which is the best. I need to find an experiment to support my topic but I have no idea! I've thought about testing the levels of proteins in the foods, but that is going to be not much different for each of the foods so I'm not sure what I will be achieving by this. Does anyone have any ideas for experiments that will have a clear different between the foods, maybe Vitamin B12 content or calcium in vegan, vegetarian and meat eating diets. It would be helpful if anyone has any method ideas or just ideas in general! Thank you!
  14. Hello! I'm having certain problems with my EE! [not the real one, it is just a "trial", as my school always does one for students in year 1]. It is on biology, my research question is: "How do certain food groups affect human memory and learning?" [human physiology], although I've realized that it fits psychology more. Also, would IB consider testing on yourself as ethical? I know that they aren't lovers of testing on others. Thx!
  15. Hello guys, I am due to submit my extended essay and I have given my subject choice as chem+bio, but I cannot come up with any good extended essay topic. I want to do something related to medicine. Any sort of help would be greatly appreciated. Thanks in advance!!
  16. Does anyone have an example of what an interim reflection for science could be?
  17. I am calculating for the vitamin C concentration of different fruits and using the formula = Molar mass of vitamin c x concentration of DCPIP x volume of DCPIP used. I am confused on how to search for the uncertainty value. Can someone please help me???? Thank you very much!
  18. Kuma

    Biology IA

    Hey there! So I need some help... My Biology IA is investigating the effect of light wavelength (i.e. colour of the light) on the rate of photosynthesis through leaf disks. I'm doing this by putting filters (cellophane) over the light. However, I'm kind of confused as to what my control would be! Would it be the light simply without a filter (white light)? Or literally no light (so in the dark)? I feel like it would have to be without the filter because with no light the control would just be testing the effect of light on photosynthesis rather than coloured light! Please Help!! From, A very thankful IB student!
  19. Hi! I am writing my EE in biology and I would really appreciate getting some advice from people who have done it in the past. What was hard for you in the process? How did you solve it? Is there anything that you think would have been helpfull to know earlier in the process? General advice and so on would be really helpfull for me both regarding the writing of the essay and the lab. Thank you
  20. Hello, I have lack of time to be able to conduct an experiment my own in a lab for my Biology IA. I have no idea about how to write a Database for the Internal Assessment in Biology and would truly appreciate it if someone could explain to me how to write it. The structure? What do I must include when writing a Database in this case? Examples? I
  21. Hello, I have to conduct an experiment for my Biology IA and I was thinking it should be about Caffeine. I am a Caffeine intolerant and I would want to make some experiment of "how to reset caffeine tolerance" and to see if its possible. Perhaps I could measure my heart/ pulse rate for 3-4 days and see if there is any difference. Now I really need to now if this idea would work for the Biology IA and I would really appreciate if any of you could suggest how I should write the research question for this experiment in this case. Now first of all, can I do this if I have human consent form ( for myself or for other humans)? Or is there a problem with using this on humans? The thing is I have to conduct this experiment on my own, so please if you have any other suggestions or ideas that I could possible do without the help of an actual Lab, I would truly be thankful for it. (research questions about any topic in human physiology maybe? ) I am an SL Biology student by the way.
  22. Hi all, So the topic I've chosen for my IA is "what is the relationship between the prevalence of migraine in specific countries and the barometric air pressure of that country?" The wording is pretty bad, but its a rough version, so i'm working on it. However, I cant find any ACTUAL data on the prevalence of migraines according to country, because all of them are kinda extrapolated, so they're not really accurate. Can I just use that? Or is that risky? Also, While there is information on barometric pressure, I dont know how to use the data. Should i just calculate the average pressure in each country? I really wanted to do this topic, and my teacher said its really good, but there isn't any point in doing it if its not going end up a good. I have other ideas, but this one I find really interesting. Any help is greatly appreciated, i'm really stressing out with this IA, and biology is one of the subjects I want to get a strong 7 on. Thanks
  23. I've been generally panicking about things I've noticed in my IA (which has already been submitted ). I just noticed that I forgot to include an in-text citation for where I got my method from. I used Kjheldahl's method for analysing proteins, and while I gave credit to Johan Kjheldahl for making the method, I didn't state the source I found this information from in the body of text (it's in the works cited though). I also have several instances of using knowledge from the syllabus without citing it. Should I have cited my textbook? I need to put my mind at ease because I'm really worried it could be deemed academic malpractice. Does the severity of infringement decide the punishment? I didn't copy and paste anything, and I'm quite sure my turnitin percentage is quite low, so could the punishment be less severe? i.e I get a 0 for the IA, but can still be eligible for diploma. Sorry for the long post! I can feel my life shortening with every IB panic attack, so I tend to ramble.
  24. So I am submitting my extended essay in Biology soon and I cannot find a clear answer as to exactly what counts in the word count. I know the general guidelines that things like tables,graphs, fotnotes and citations don't count in the word count but I don't know about things like headings such as Introduction, Hypothesis, Conclusion etc. as well as titles of tables such as "Table 1: Average Glucose Concentration" etc. count. Do those things count in the word count? Thanks
  25. Hello everyone I am willing to apply for medicine in the UK. I am aware of the competitiveness of this course and thus, I would like to maximize my chances of getting in. I know that medical universities perceive more favourably candidates with an EE in biology as it proves their interest in the area. However, to what extent is it taken into account? My point is, writing an EE in science and getting and A is difficult and definitely more risky in comparison to other subjects. My dilemma is: Is it better to write an EE in biology and risk getting a worse grade but having a science topic as an advantage? OR Would it be more secure for me to do an EE in English B, while in all likelihood putting the same effort (as in bio EE) it would provide a sure A? All in all, which option is more reasonable to choose? Do universities value more following your area of interest or do they firstly consider points? What do you think? Thank you for all your opinions!