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  • Biology-Online • View topic - Theories - Origin of Life
    to the three different domains of life i e archaea prokarya bacteria and eukarya I m sorry for moving your post to the second to last page especially since it is more on the topic Reply with quote wildfunguy wildfunguy Posts 109 Joined Sat Feb 18 2012 4 28 am Re Theories Origin of Life Sat Sep 28 2013 9 21 pm Considering my metaphor further I suppose the beneficial viewpoint would still be compatible with the idea that the original population contained Toyota parts Nissan parts and an intermediate group of Niss yota parts that were lost during speciation In that case the initial population should show a wide range of hybrid viability and the separated populations should not produce hyrbids that consistently fall below that range of viability Of course hybrid viability would have to be measured with respect to non hybrid viability to control for any increase decrease in harmful mutations Reply with quote Cat Cat Posts 635 Joined Thu Feb 14 2008 7 40 pm Re Theories Origin of Life Tue Oct 15 2013 12 23 am wildfunguy wrote Cat wrote FYI I am one biologist that disagrees Most mutations are neutral It depends on whether you re talking about mutations to the genotype or mutations to the phenotype Genotype Change in phenotype is the result of the mutation There can be no mutations to the phenotype by definition Reply with quote Luxorien Luxorien Posts 55 Joined Fri Jan 20 2012 1 27 am Re Theories Origin of Life Sat Nov 16 2013 7 32 pm Cat wrote wildfunguy wrote Cat wrote FYI I am one biologist that disagrees Most mutations are neutral It depends on whether you re talking about mutations to the genotype or mutations to the phenotype Genotype Change in phenotype is the result of the mutation There can be no mutations to the phenotype by definition If you have hours of time to waste going back through this ridiculously long thread I started out saying most mutations were neutral Then he brought up studies on bacteria that talked about most mutations being harmful Toward the end I was attempting to argue that most random errors do cause problems but cellular mechanisms correct those errors or cause the resulting piece of DNA to be so broken that it isn t viable so that by the time you are looking at phenotypes most mutations are neutral because many of the most harmful ones have been weeded out Reply with quote Sumanth001 Sumanth001 Posts 23 Joined Sun Jun 30 2013 2 53 am Sat Nov 30 2013 5 13 pm crazy idea but if u remember the miller and Urey experiment for origin of life inorganic substances form the proteins Does this mean that inorganic substances changed in form as time advanced in the young Earth Reply with quote Dthink1010 Dthink1010 Posts 1 Joined Mon Feb 03 2014 3 13 pm Tue Feb 04 2014 8 06 pm where s Scottie on this Reply with

    Original URL path: http://www.biology-online.org/biology-forum/about14351-552.html (2016-02-17)
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  • Biology-Online • View topic - Cost of Substitution (Re: Haldane's Dilemma)
    comes up is the Cost of Substitution Can anyone explain Cost of Substitution in layman s terms Reply with quote Cat Cat Posts 635 Joined Thu Feb 14 2008 7 40 pm Fri Oct 31 2014 2 44 am In laymen terms when evolution switches gears major environmental change large portion of population will die Original argument was that calculated loss in population is such a case disproves evolution However

    Original URL path: http://www.biology-online.org/biology-forum/about41087.html (2016-02-17)
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  • Biology-Online • View topic - Which has a greater impact of evolution, mutations or genet
    does not tell me which source of genetic variability mutations or recombination produce the largest genetic variations which natural selection operates on However an Anthropology a science that studies humans within the contexts of biology and culture textbook states that Mutations are the most important source of variety on which natural selection depends and operates I am confused Which is the most important source of variety on which natural selection depends and operates mutations or genetic recombination Am I correct in stating that within a population of sexually reproducing organisms genetic recombination produces more genetic variation compared to mutations and thus is a more important source on of variability on which natural selection operates whereas in populations of organisms that reproduce asexually mutations are the only source of variability on which natural selection operates Thanks Reply with quote Cat Cat Posts 635 Joined Thu Feb 14 2008 7 40 pm Re Which has a greater impact of evolution mutations or genet Fri Oct 31 2014 2 26 am alpha78 wrote Am I correct in stating that within a population of sexually reproducing organisms genetic recombination produces more genetic variation compared to mutations and thus is a more important source on of variability on which natural selection operates whereas in populations of organisms that reproduce asexually mutations are the only source of variability on which natural selection operates It s hard to answer your question conclusively because it largely depends on the definition for the mutation When you see something that says that mutations are rare they most likely meant pathogenic mutations It such cases benign mutations and silent mutations are considered normal variation resulting in alternative allele Genetic recombination results in rearrangement of genes leading to progeny having a new and unique combination of genes except identical twins You also

    Original URL path: http://www.biology-online.org/biology-forum/about41098.html (2016-02-17)
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  • Biology-Online • View forum - Evolution
    2 Sat Jan 23 2016 4 22 am human dietry evolution since the agricultural revolution 6 Mon Jan 18 2016 1 28 pm Mendelian creations and natural selection animals 1 Sun Jan 17 2016 9 04 pm Taxonomy question close to the Last Universal Ancestor 3 Sun Jan 17 2016 9 03 pm A new evolution theory 3 Sun Jan 17 2016 9 01 pm Question on Neutral Mutations 1 Wed Dec 30 2015 6 38 pm Where do new species come from 2 Thu Nov 19 2015 2 06 am Am I the Next Step in Human Evolution 26 Wed Nov 04 2015 11 45 am Go to page 1 2 3 Evolution 1 Tue Nov 03 2015 6 11 pm New theory of evolution 3 Wed Oct 07 2015 1 39 pm holographic origin of life 17 Sat Sep 12 2015 4 47 pm Go to page 1 2 Gender divison in two opposites is greatest mistake of manki 30 Wed Sep 02 2015 11 07 am Go to page 1 2 3 Irrefutable Facts Against Evolution 53 Tue Jul 07 2015 11 07 pm Go to page 1 2 3 4 5 Islands and Evolution 6 Mon Apr 13 2015 8 11 am human brain size 1 Tue Mar 03 2015 9 51 am Locomotory Evolution 1 Sun Feb 01 2015 12 36 pm The evolution of facilitation and semelparity 3 Mon Jan 12 2015 11 05 pm Evolutionary psychology 2 Mon Dec 22 2014 4 22 pm Mutuation saturation at a particular locus 0 Fri Dec 19 2014 8 43 pm Can human body hair disappear as a result of clothing 4 Sun Dec 14 2014 7 13 pm Dr Jobe Martin Arguments 10 Tue Dec 02 2014 4 24 pm Theories Origin of Life 563

    Original URL path: http://www.biology-online.org/biology-forum/forum-14.html?mobile=mobile (2016-02-17)
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  • Biology-Online • View forum - Microbiology
    Dec 03 2014 12 31 am Starch Hydrolysis 0 Sun Nov 30 2014 10 00 am Bordetella pertussis 0 Thu Nov 27 2014 9 07 pm Mycobacterium vaccae 0 Sun Nov 09 2014 5 03 am UTI Issue Need Help 2 Sat Nov 08 2014 5 02 pm P2 Safety 1 Sat Nov 08 2014 5 02 pm Ebola 2014 Medical Ethical Issues youtube lecture 0 Thu Nov 06 2014 4 42 pm Swarming Assay 0 Wed Oct 29 2014 8 21 pm are biological mushrooms with virus combinable 5 Mon Oct 20 2014 9 49 am ID OF UNKNOWN 6 Fri Oct 10 2014 6 34 am Bacteria w Antibiotic Treatment 3 Tue Oct 07 2014 8 49 pm URGENT HELP IDENTIFYING UNKNOWN BACTERIA 7 Wed Sep 24 2014 7 49 pm Multicellular prokaryote 27 Fri Sep 19 2014 7 54 pm Go to page 1 2 3 convert human DNA into RNA and use a retro virus 0 Sat Sep 13 2014 2 21 pm single bacterium 1 Thu Sep 04 2014 9 39 pm How is Mycoplasma a gram positive bacteria 2 Thu Aug 14 2014 12 25 am staphylococcus aureus and biofilm formation 3 Fri Aug 01 2014 7 53 pm A theoretical question Genetic manipulation 4 Wed Jul 23 2014 7 00 pm rabies virus and tetanus bacteria 5 Wed Jul 23 2014 5 33 pm sterilization in microwave oven 29 Tue Mar 18 2014 3 13 pm Go to page 1 2 3 Slicing frozen chromosomes with lasers and scanning with SEM 4 Wed Feb 26 2014 6 57 pm International Conference on Beneficial Microbes 2014 0 Wed Jan 08 2014 9 17 am Secondary Sugars metabolism sugar bacteria Lac Operon 2 Thu Dec 26 2013 5 59 pm Streptococcus sanguis 1 Sat Dec

    Original URL path: http://www.biology-online.org/biology-forum/topic-3-25.html (2016-02-17)
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  • Biology-Online • View forum - Microbiology
    25 pm Mechanism behind Cyanobacterial Cryptobiosis 0 Fri Nov 22 2013 5 54 pm Coral mushroom 1 Fri Nov 22 2013 4 53 pm Agriculture and Microbiology come together Research Prjct 2 Sat Nov 16 2013 7 08 am Help with unknown 0 Sun Oct 20 2013 2 43 am Fusobacteria G C ratio 1 Fri Oct 18 2013 4 38 pm How does a virus become anti apopotic 2 Mon Oct 14 2013 9 20 am Sulfur Cycle Help 0 Fri Oct 04 2013 1 55 am SMEWW 0 Mon Sep 30 2013 1 44 am Using oxidizing agents in gram stain 1 Sun Sep 22 2013 3 13 pm Yeast Fermenetation on Different Sugars 1 Fri Sep 13 2013 1 53 pm Veal infusion agar broth 3 Wed Sep 11 2013 10 20 pm Innova 4000 Benchtop Incubator Shaker 1 Tue Sep 10 2013 12 33 pm Rat s Fecal 2 Fri Sep 06 2013 9 05 am white spots in clear glass bottles 0 Fri Sep 06 2013 2 09 am Fungus 10 Tue Sep 03 2013 1 39 pm Why do carrots spark in the microwave 7 Fri Aug 30 2013 10 00 pm Antibiotecs Extraction

    Original URL path: http://www.biology-online.org/biology-forum/topic-3-50.html (2016-02-17)
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  • Biology-Online • View forum - Microbiology
    20E strip test 0 Tue Jul 23 2013 2 24 pm Differentiating media for yeast 0 Tue Jul 16 2013 5 29 pm Dry Yeast Production 0 Mon Jul 15 2013 3 52 pm How to maintain sterility while preparing petri dishes 8 Sat Jun 29 2013 3 11 am Getting Bacteria from an OD0 8 to an OD 0 1 1 Mon Jun 17 2013 7 20 am is mosquito saliva hypotonic to plasma HIV concern 0 Tue Jun 04 2013 9 38 am Characteristics of Good Indicator Organisms 2 Sat Jun 01 2013 6 53 am Paramecium don t like sugar 4 Thu May 30 2013 3 17 pm gram negative cocci please help 8 Tue May 28 2013 2 46 pm Salmonella and e Coli 12 Mon May 27 2013 2 20 pm Go to page 1 2 protein fractionation 4 Mon May 20 2013 10 07 pm Help with my unknow 2 Mon May 20 2013 3 30 pm An interesting question 2 Mon May 20 2013 3 18 pm Producing unknown protein 2 Mon May 20 2013 1 56 pm Please help 3 Sun May 05 2013 3 47 pm incubating streptomyces lydicus 4 Tue Mar 26 2013 4 03 pm growing bacteria in petri dishes 8 Sun Mar 10 2013 2 30 pm How to proceed to check for its Probiotic ability 0 Sat Mar 09 2013 2 02 pm Curious about these fungi 0 Sat Feb 09 2013 12 14 am Can HIV crosses placenta 2 Fri Feb 01 2013 2 03 pm Does micrococcus lysodeikticus thrive in high temperatures 0 Wed Jan 23 2013 5 08 am Difference between Virulence and Pathogenicity 1 Thu Jan 17 2013 11 26 am Bacterial Calculation 3 Sun Jan 13 2013 9 43 am Magnetite reducing

    Original URL path: http://www.biology-online.org/biology-forum/topic-3-75.html (2016-02-17)
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  • Biology-Online • View forum - Microbiology
    bacterial cultures 4 Fri Dec 07 2012 3 03 am Help Unknown Bacteria I have no idea where to look T 1 Tue Dec 04 2012 5 00 am CFU conversion 4 Mon Dec 03 2012 8 22 am water problem work sheet 8 Fri Nov 30 2012 1 29 am Chemoautotroph 1 Thu Nov 29 2012 11 20 pm Standards for Milk Frozen Vegetables 0 Fri Nov 23 2012 8 19 pm How can an adenovirus gain the host cell s genetic info 1 Fri Nov 23 2012 6 07 am Does the adenovirus produce a provirus 0 Fri Nov 23 2012 5 21 am Increasing the amount of bacteria per ml in a suspension 2 Thu Nov 15 2012 9 32 am λ Phase Genetic Switch 1 Thu Nov 01 2012 10 08 am Suggestions for particularly cool bacteria and fungi 1 Sun Oct 28 2012 6 45 pm Gram Positive Cocci 2 Sun Oct 28 2012 6 34 am HELPP Please Unidentifiable Unkown 1 Sun Oct 28 2012 6 30 am How does pH change during sporulation Help 2 Thu Oct 25 2012 6 09 pm Methods of mass production Batch fed batch and continuous 0 Sun Oct 14 2012 4 56 am transmission of virus 0 Tue Oct 09 2012 1 35 am Questions regarding retroviruses 2 Mon Oct 08 2012 2 52 pm Mutations and Selective Pressure 4 Sun Oct 07 2012 2 11 pm Kindly help me fill up this NOCARDIA 6 Sun Sep 16 2012 12 15 am Viruses VS Bacteria 4 Fri Sep 14 2012 2 34 pm protozoan 6 Thu Sep 13 2012 2 30 am question on genotype 1 Mon Sep 10 2012 12 08 am Unknown Organism 5 Sun Sep 09 2012 9 12 pm Please Help Identify My

    Original URL path: http://www.biology-online.org/biology-forum/topic-3-100.html (2016-02-17)
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