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Many useful and important materials can be recovered, or extracted from dried cells. For laboratory purposes, proteins, lipids and nucleic acids, receptors and a variety of biomarkers can be recovered for a wide range of purposes.
Density is useful for identifying an unknown material because it is a physical constant. A physical constant is a unique characteristic of the material in question. This constant never change or vary with the shape or amount of the material/substance.
because it is a characteristic property of matter
Carbohydrates, Lipids, Protiens,and Nucleic acids. All these are very useful for various reasons.
I was searching for the same thing and found this fairly useful web page: http://www.fhsu.edu/chemistry/twiese/360/lipids/tsld004.htm Its not very detailed, but it gives you the outlines really quick.
knowledge is useful for communication. I think what you want the the answer is both communicated parties have different level of knowledge, or some one is illiterate about the topic, then communication barries occured.
nothing
It is the characteristic
color
Apart from being used for energy and warmth, lipids are also useful for making cell membranes and all the different hormones in the body.
they are magnetic
Characteristic properties.
Well, they characterize, dont they?
Control Charts
Well, they help characterize objects, don't they?
choosing the characteristic that will produce the most useful groupings.
One useful characteristic is that it is a lot lighter than steel.