Mindblown: a blog about philosophy.

The internal transcribed spacers of 18S–26S nuclear ribosomal DNA, characterised by tandem repeat structure and high copy number; typically used in molecular systematics at the species level.  

Narrowed part connecting two wider parts. The narrow connection between two larger bodies or parts of an organ. Narrow connecting part, as the band of tissue connecting the lobes of the thyroid gland. Narrow passage between two connecting body cavities or parts. A constricted or narrowed part of an organ or tissue, such as the…

(Of sporangia) with the two halves of equal size.  

(In nomenclature) duplicates of a holotype; parts of a single gathering. In immunology, one of the determinants on the immunoglobulin molecule that distinguish among the main classes of antibodies of a given species. They are the same for all normal individuals of that species.  

(Of branching) dichotomous, with ± equal shoots.  

(In nomenclature) a duplicate of a syntype.  

With as many stamens as petals.  

(In pollen) those grains where the two halves are similar.  

With leaves of one kind.  

Duplicates of the neotype.