 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Natural Science Forum / Biology / Microbiology / July 2008Domains
What is the difference between a domain and a kingdom if you can 'swap' between them???? And is Archaea a domain or part of the bacteria kingdom? My teacher says that it is domain but others say it isn't... I am so confused!!!! > What is the difference between a domain and a kingdom if you can > 'swap' between them???? [quoted text clipped - 3 lines] > My teacher says that it is domain but others say it isn't... > I am so confused!!!! Archaea is not bacteria. Different taxonomy system may put it into different position. I think archaea kingdom is more common. > > What is the difference between a domain and a kingdom if you can > > 'swap' between them???? [quoted text clipped - 7 lines] > Different taxonomy system may put it into different position. I think > archaea kingdom is more common. But i thought that Carl Woese cam eup with another way of classifying bacteri and archaea by reading the genes? > > > What is the difference between a domain and a kingdom if you can > > > 'swap' between them???? [quoted text clipped - 10 lines] > But i thought that Carl Woese cam eup with another way of classifying > bacteri and archaea by reading the genes? Yes, He did that by analyzing rRNA. And it is very amazing that some single-cell organisms have differences in not only gene of rRNA, but also several metabolic pathways. So they are classified into a new domain or kingdom as Archaea. >What is the difference between a domain and a kingdom if you can >'swap' between them???? What do you mean, swap between them? >And is Archaea a domain or part of the bacteria kingdom? Archaea used to be considered part of the bacteria, but are not anymore. Calling them a domain is common. >My teacher says that it is domain but others say it isn't... Not surprised. Terminology does vary. For now, use what your teacher prefers, but be aware that others do it differently. (Your teacher is doing the way that is now common.) For historical perspective... It used to be that kingdom was the top level of hierarchy. But with new discoveries, it seemed that the old kingdom system was inadequate. There are various approaches to improve it, and it really is true that people disagree. I have a very fine biology textbook from 1989 that still classifies the archaea as a phylum of the bacteria -- though it does note that that is being challenged. Basically what happened is that the more we learned about archaea, the less sense it made to group them with bacteria. That is, new knowledge drove the change. >I am so confused!!!! Good. That means you were paying attention. :-) bob > >What is the difference between a domain and a kingdom if you can > >'swap' between them???? [quoted text clipped - 30 lines] > > bob If archaea is a phylum of bacteria, doesn't that mean that archaea has the same functions as bacteria? But scientists have proved that the rRNA sequences; RNA polymerase; Antibiotic Sensitivity; Peptidoglycan in cell walls and membrane liipids differ ffrom each other! i am confused because my bio teacher talks stuffs i don't understand... >> >I am so confused!!!! >> [quoted text clipped - 4 lines] >If archaea is a phylum of bacteria, doesn't that mean that archaea has >the same functions as bacteria? But all organisms -- bacteria, archaea, and humans -- have more or less the same functions. Classifying them is an art, of interpretation. Anyway, we no longer classify arch as a phylum of bact. That is no longer acceptable to most people. Remember, until "fairly recently" there was very little info about bacteria beyond what one could see in the microscope. Very limited. And when people first started finding arch, they seemed sort of like bacteria -- until more info became available. In another msg, you mentioned Woese. Indeed, it was his genetic work -- on one gene -- that provided more info than all previous work together. His work made much clearer how distinct bact and arch are. >But scientists have proved that the rRNA sequences; RNA polymerase; >Antibiotic Sensitivity; Peptidoglycan in cell walls and membrane >liipids differ ffrom each other! > >i am confused because my bio teacher talks stuffs i don't understand... It is confusing, esp when you hear different things. You are handling it well by asking. Remember, that what we teach is "our best understanding at the moment". And that understanding changes over time. That is what science is about -- we are always making progress, improving our understanding. The classification is very different now than when I first took biology (in high school, 1959) -- because so much more has been learned. It sounds like your teacher is giving you a good modern view. You might ask why others are giving another view. Are they scientists knowledgeable in the field? If so, maybe ask them why they hold their views. Or maybe it is someone who has an older book, or is somehow just not up to date. Is this high school or college level? bob > >> >I am so confused!!!! > [quoted text clipped - 42 lines] > views. Or maybe it is someone who has an older book, or is somehow > just not up to date. The scientists were international scientists that have names all over the world! > Is this high school or college level? Uhhh... college level but i am just 12 and studying in NUS High School Of Mathematics and Science > bob >>>>> I am so confused!!!! >>>> Good. That means you were paying attention. :-) [quoted text clipped - 46 lines] > >> bob While I agree that you are on the right track by asking questions to clarify apparent contradictions, I don't think this is the best forum for doing so. Oh, you can get good answers to these kinds of questions from many of the folks who hang out here, but the time/place to ask the questions is when/where they arise. That is, ask the people who are making the contradictory statements when they make them! It may well be that they are trying to make some sort of specific point by taking the positions they state and you aren't going to identify that unless you ask them directly for clarification. Otherwise, you have people who are trying to determine what it is you are actually asking without any context for the questions, making it devilishly hard for anyone to actually deal with your concerns. Along that line, it still isn't clear how it is that you are being exposed to college level material while only 12 and in high school, unless you are in some sort of accelerated honors course.  SignatureLarry D. Farrell, Ph.D. Professor Emeritus of Microbiology Idaho State University ** Posted from http://www.teranews.com ** > >>>>> I am so confused!!!! > >>>> Good. That means you were paying attention. :-) [quoted text clipped - 62 lines] > only 12 and in high school, unless you are in some sort of accelerated > honors course. His statement about college level and high school confuses me as well. :) > -- > Larry D. Farrell, Ph.D. > Professor Emeritus of Microbiology > Idaho State University > ** Posted fromhttp://www.teranews.com** > > >>>>> I am so confused!!!! > > >>>> Good. That means you were paying attention. :-) [quoted text clipped - 71 lines] > > Idaho State University > > ** Posted fromhttp://www.teranews.com** haha yep, its confusing... > >>>>> I am so confused!!!! > >>>> Good. That means you were paying attention. :-) [quoted text clipped - 50 lines] > clarify apparent contradictions, I don't think this is the best forum > for doing so. Can you give me the link of the website that you think that is most appropriate for me? > Oh, you can get good answers to these kinds of questions > from many of the folks who hang out here, but the time/place to ask the [quoted text clipped - 3 lines] > positions they state and you aren't going to identify that unless you > ask them directly for clarification. Uhhh... i don't know how to get to them... =P >Otherwise, you have people who are > trying to determine what it is you are actually asking without any [quoted text clipped - 3 lines] > only 12 and in high school, unless you are in some sort of accelerated > honors course. Uhhh... my school expects us to be good in maths and science... but i am better in physics... > -- > Larry D. Farrell, Ph.D. > Professor Emeritus of Microbiology > Idaho State University > ** Posted from:http://www.teranews.com/** !!!!! I CAN;T BELIEVE MY QUESTION COULD GET A PROFFESOR LIKE YOU TO ANSWER ME!!!!!!!!!!! WOOTS!!!! >> Is this high school or college level? >> >Uhhh... college level but i am just 12 and studying in NUS High School >Of Mathematics and Science Wow! Sounds like a great opportunity. Is this a special summer course, or part of your regular curriculum? Are you with other students your age, or with regular college students? What/where is NUS? Larry Farrell made a good point about you asking some of these questions there, to your teacher or whomever. Asking here is good, but some things are easier to deal with "live", where you can more easily go back and forth -- having a conversation. From asking here I think you at least realize that you are asking a good and complex question. So be bold and ask there. But, let me continue anyway... Can you be more specific about what alternatives concern you (besides what your teacher says, which seems good)? By whom? If it is something you read, do you know the date? (It can really matter on something like this, where the views have changed fairly recently.) Have you come across other things where you find different views presented? It may be more common in biology now. This is really an exciting time in biology; there has been a revolution in biology in last half century or so, and it continues. best, bob > >> Is this high school or college level? > [quoted text clipped - 30 lines] > > bob Uhhh... NUS is the National University of Singapore but i am in The High School of it... Its actually an advanced school recognised by the top universities of the world... |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.