Dictionary » B » Barrier



An obstruction.

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Population ecology

... on the bottom. What event would most likely lead to the outcome of just small ones and large ones- whipping out the middle size. Temp change? Barrier?

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by Tlaurain
Fri Apr 11, 2014 5:36 pm
Forum: Ecology
Topic: Population ecology
Replies: 1
Views: 1971

Speciation challenges the meaning of "beneficial mutation"

... that would indicate true divergence. Indeed, such variations could be present even before the population has been split up by a geographic barrier. Prior to a geographic split, there could have been A, B, and C variants, where only A and C variants were incompatible. While the B variants ...

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by wildfunguy
Sat Sep 28, 2013 11:11 pm
Forum: Evolution
Topic: Speciation challenges the meaning of "beneficial mutation"
Replies: 3
Views: 9673

plasmodesm and gap junction

... so they must be passed by plasmodesmata (with 20-40 nm diameter). As a result, every plant cell needs plasmodesmata but animal cells haven't any barrier like cell walls for protein transportation. So an animal cell necessarily doesn't have gap junction. But I'm not sure. Is it right? Any idea ...

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by mnatashgaran
Mon Apr 01, 2013 7:46 pm
Forum: Cell Biology
Topic: plasmodesm and gap junction
Replies: 1
Views: 2533

Sperm Immunity of Womens

... reaction against them. Therefore, mechanisms for their protection must exist in this organ to prevent any autoimmune reaction. The blood-testis barrier is likely to contribute to the survival of sperm. However, it is believed in the field of testicular immunology that the blood-testis barrier ...

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by ankitaalive
Wed Nov 28, 2012 6:28 am
Forum: Cell Biology
Topic: Sperm Immunity of Womens
Replies: 1
Views: 2816

Re: Recombinant DNA not degraded inside transformed cells, why?

... on time. Zhang G, Wang W, Deng A, Sun Z, Zhang Y, et al. (2012) A Mimicking-of-DNA-Methylation-Patterns Pipeline for Overcoming the Restriction Barrier of Bacteria. PLoS Genet 8(9): e1002987. doi:10.1371/journal.pgen.1002987 http://www.plosgenetics.org/article/info%3Adoi%2F10.1371%2Fjournal.pgen.1002987

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by jonmoulton
Fri Sep 28, 2012 6:18 pm
Forum: Genetics
Topic: Recombinant DNA not degraded inside transformed cells, why?
Replies: 10
Views: 6025
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