Triglycerides, phospholipids and sterols are the most common members of the lipids family, the class of nutrients made up primarily of dietary fats. Lipids are naturally occurring compounds that all share one trait in common: they're insoluble in water.
In plant cell sieve tubes has no nucleus when fully developed it helps in transportation of minerals and in animal cell the red blood cells has no nucleus when fully developed
The correct answer is that when a species is made up of different smaller groups, each of those smaller groups is known as a variety.
