Answer:
Explanation:
Helium is the second most abundant element in the universe, but here on earth, it's rather rare. Most people guess that we extract helium from the air, but actually we dig it out of the ground. Helium can be found in certain parts of the world, notably in Texas, as a minor component in some sources of natural gas.
Helium is generated underground by the radioactive decay of heavy elements such as uranium and thorium. Part of the radiation from these elements consists of alpha particles, which form the nuclei of helium atoms. ... Helium can also be produced by liquefying air and separating the component gases
When the gas contains more than about 0.4% helium by volume, a cryogenic distillation method is often used in order to recover the helium content. Once the helium has been separated from the natural gas, it undergoes further refining to bring it to 99.99+% purity for commercial use.
Answer: phylum Echinodermata
Kidneys filter the extra water plus toxic materials in our blood. The help maintains homeostasis by keeping the level of toxin down.
Answer:
The correct answer is option B. medicare select.
Explanation:
A Medicare select policy is a medicare policy that limits the coverage to the network of hospitals, doctors, and healthcare providers. This medicare plan allows the insured to negotiate with the healthcare providers so it is cost-effective as they charge less for their services.
Other plans given in options such as advantage medicare give a wide range of network of healthcare provider however they charge more than the medicare select plan.
Thus, the correct answer is option B. medicare select.
