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.
By Neale Monks. Algae are photosynthetic organisms somewhat like plants in structure at a cellular level, but rather different in many other regards. For a start, many algae are single-celled organisms, and these are the ones that form a slimy layer on solid objects including the glass walls of your aquarium.