Nematode Body Structure. The phrase tube-within-a-tube is a convenient way to think of nematode body structure, and also a term used to refer to a major trend in the evolution of triploblastic metazoa (Brusca and Brusca, 1990 Invertebrates).
Neutrals and Universal Colors. Let me explain in details... In general, neutrals include black, white, gray (mix black with white and you've got gray) and different shades of brown. Nowadays a color can be called a neutral based on how effectively it can blend in with other colors. Basically, they match with all colors and color combinations - and don't create much of an emotion.
As said by the Oxford English dictionary, grey is âa colour intermediate between black and white, as of ashes or lead.â Grey is used as an adjective, noun and a verb. This article explains to you clearly what the difference between gray and grey is and also any other meaning these two words, grey and gray, might have.