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Dec
5
reviewed Reviewed What happens when we know that there is something that we forgot but we can't remember what it was?
Dec
5
comment Is cell senescence in culture comparable to that in vivo?
I wouldn't have said redundant, simply because that is what our in vivo experiment was designed to emulate - we have aged a culture of cells (human primary cell lines) by repeated passage until growth arrest (confirmed by β-galactosidase, morphological changes, and drastic slowing of doubling time). We are now using these as models of senescence in vitro. If I understand you correctly then this is a reasonable model because senescent cells tend to display quite a homogenous phenotype? So even though senescent cells in vitro may have arrived by a different route, this is still a good model?
Dec
4
comment Is cell senescence in culture comparable to that in vivo?
Hi - thanks for the info on senescent cells. So you are saying that cells senesced in culture are comparable to those in vivo? Or you are saying that they are not comparable, because senescent cells in vivo are not necessarily replicatively senesced cells?
Nov
26
reviewed Leave Open Good book on Origin of Life
Nov
9
reviewed Approve Tuna fish in Baltic sea?
Nov
6
accepted Can epigenetic changes affect reproductive success?
Nov
6
accepted Does mixing alcoholic drinks really make you more drunk?
Oct
8
awarded  Citizen Patrol
Oct
8
comment Do diurnal birds of prey recognize each other by their appearance?
@Everyone that is true of course - but I imagine that a bird of prey would call to identify themselves to another bird, as you would have to be much closer to identify by sight. We use sound to identify people easily too - over the phone for example we can easily recognize a voice we know, without having any prior knowledge as to who it may be. I'm speculating of course, but it seems to me that sound would be much more useful to a bird in flight, or in a tree, because you may not be able to see one another!
Oct
8
answered Do diurnal birds of prey recognize each other by their appearance?
Oct
7
answered Why is the floral biodiversity of grazed grassland higher than that of mown grassland?
Oct
7
comment What type of biome is this?
I'm not familiar with the definitions of a tropical savanna I'm afraid. Is this a homework question?
Oct
6
comment Difference between Condensin and Cohesin proteins?
You can edit your original question (by clicking 'edit', next to the vote buttons) to make it clearer, and tidy it up. I can do this if you would rather. Also my name is Luke, feel free to use it! :)
Oct
5
comment Difference between Condensin and Cohesin proteins?
Hi and welcome to bio.SE! When asking your questions, try to be as clear and provide as much information as is possible/relevant to help you get the best answer. Here, I think you need to separate your questions out a bit - you're asking about the difference in functions of the 2 proteins (cohesin and condesin), and you're also asking about cohesin's role in forming the kinetochore (related, but slightly separate). And what are you referring to when you ask 'how do they vary'? The 2 proteins? Don't be afraid to write a couple of paragraphs so that it is clear what you're asking. Thanks.
Oct
5
comment Why does squinting allow you to see objects more clearly?
I can't think of any harmful effects, can you? Maybe constantly squinting would actually alter the shape of your eye/retina slightly, thus meaning you'd always need to squint (or get glasses)?
Oct
5
comment Average number of gene products in (a) eukaryote(s)
I thought it was much higher than this! More in the region of 100's of thousands, because the majority of genes have at least 2 alternative isoforms, usually more... I'll try to find some evidence. If this is the case then I am surprised (also I'm not getting at you - I realize you have cited UniProt, arguably the authority on this!)
Oct
4
comment Can epigenetic changes affect reproductive success?
Nice. Thanks Lance.
Oct
4
asked Can epigenetic changes affect reproductive success?
Oct
4
awarded  Electorate
Oct
3
comment Multi-nucleated cells: advantages and examples?
@jello yes I realize that polymorphonuclear does not mean multiple nuclei, but 'mononuclear' does imply that 'ploynuclear' cells exist, and I am sure that muscle fibres do have multiple nuclei, because multiple cells fuse together. I'm interested to know the advantages of multiple nuclei, and what other cell types have it. Thanks