1. Lacking elasticity; unyielding or unadaptable. See Synonyms at stiff. 2. Economics Of, relating to, or being a good for which changes in price have little effect on the quantity demanded or supplied: the inelastic demand for cigarettes.
The classification of algae is complex and somewhat controversial, especially concerning. the blue-green algae (Cyanobacteria), which are sometimes known as blue-green. bacteria or Cyanophyta and sometimes included in the Chlorophyta. These topics are. not covered in detail this document.
Re: Scientific Names of Green, Yellow, Black Algae Those are general categories of algae types rather than specific species. Green algae are in the Chlorophyta division of the plant (Viridiplantae) kingdom. They contain green chlorophyll a and b. A typical common green algae found in pools is the genus Oocystis.