Heptane
(Science: chemistry) Any one of several isometric hydrocarbons, C7H16, of the paraffin series (nine are possible, four are known); so called because the molecule has seven carbon atoms. Specifically, a colourless liquid, found as a constituent of petroleum, in the tar oil of cannel coal, etc.
Origin: gr. ”epta seven.
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..
The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..
Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..
This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..