A plough (UK) or plow (US; both /ËplaÊ/) is a tool or farm implement used in farming for initial cultivation of soil in preparation for sowing seed or planting to loosen or turn the soil. Ploughs were traditionally drawn by working animals such as horses or cattle, but in modern times are drawn by tractors.
Polar/Nonpolar Regions. In a biological membrane, the phospholipids are organized into a bilayer, which serves as the framework in which the other components of the membrane are embedded.
Phospholipids are amphipatic (has a hydrophillic region and a hydrophobic region) due to the hydrophillic phosphoester and the hydrophobic fatty acid chains. Triglycerides are the chemical form in which most fat exists in food as well as in the body. They're also present in blood plasma.