Carotenoids are organic pigments that are found in the chloroplasts and chromoplasts of plants and some other photosynthetic organisms, including some bacteria and some fungi. Carotenoids can be produced from fats and other basic organic metabolic building blocks by all these organisms.or the same reason, carotenoid colors often predominate in ripe fruit after being unmasked by the disappearance of chlorophyll. Carotenoids give the characteristic color to carrots, corn, canaries, and daffodils, as well as egg yolks, rutabagas, buttercups, and bananas.
The defining component of Linux is the Linux kernel, an operating system kernel first released on 5 October 1991 by Linus Torvalds. The Free Software Foundation uses the name GNU/Linux to describe the operating system, which has led to some controversy.
In fact, Linux was born as an alternative to UNIX Penguin Origins: The History of Linux [Geek History] with the goal of being UNIX-compatible, which explains why the two have a lot of similarities and why they are often conflated. In that sense, Linux is a UNIX-like, not a UNIX-based, operating system. In other words, Linux was influenced by UNIX, but UNIX systems have no relation to Linux. With that said, here are some of the more important UNIX systems that still exist today and are worth knowing about.