Cesium is used in the separation of DNA with different densities. Cesium chloride (CsCl) acts as a density gradient for the separation of the DNA (Deoxy ribonucleic acid), and is used in gradient centrifugation.
CsCl density centrifugation:
- CaCl solution is kept in the centrifuge tube along with the DNA sample to be separated.
- The centrifugation causes the solutions to form bands with the denser part at the bottom and the least denser part at the top.
- The DNA with its density similar to a particular layer of CsCl solution density forms a band in that layer.
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<u>Answer</u>: c. Natural gas.
<u>Explanation</u>:
- <em>Natural gas</em> is a fossil fuel and thus a<em> non-renewable resource.</em>
- Natural gas is widely used for the purpose of heating, cooking, and generation of electricity.
- The process of formation of natural gas takes place over millions of years from decomposing plant and animal material subjected to heat and pressure.
<em>Thus, natural gas cannot be used for the conservation of resources.</em>
It is the abdominal cavity that contains the digestive organs.
Biodiversity is a topic of science therefore it is not an example of economics .
