Validity

well i'm doing an work with imageJ software with colour deconvolution (detection of DAB stain) and i need for validity this article: Quantification of histochemical staining by color deconvolution. Anal Quant Cytol Histol 23: 291-299, 2001 if someone has this article and has been ...

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This makes it difficult to always describe a species or judge the validity of a new species, fact is biologists dont know what a species or phylum are

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So lets hear it. I want to know what you have to say about the validity of subspecies, purpose, origin of concept, what type of biologists follow(ed) it, and how it applies and either conflicts or supports various species concepts. Are there problems with ...

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... glasses" will see them as so. please read the link I provided and furthermore, check out his links to studies supporting the validity of the K/Ar method.

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... populations Phylogenetic: Smallest monophyletic group on phylogenetic tree This makes it difficult to always describe a species or judge the validity of a new species, but the same problem is analogous to mental health. We can define depression as having symptoms of x and y but deciding whether ...

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