True, that is a document that is left to a person over 18 years old, who may be a family member or not, that person may be able to make decisions for the patient if he or she loses the ability to make decisions for themselves. When designating a healthcare agent, you can make sure that the medical professionals respect the patient´s wishes. The agent can also decide how wishes can be applied as the illness changes. Hospitals, doctors and others medical professionals must follow the decisions of the health agent if they were the patient´s
Answer: Free-floating DNA is a term used to describe Prokaryotic DNA because such cells do not contain a distinct nucleus complete with a nuclear membrane. Such DNA simply exist in a region in the cytoplasm called nucleoid. Nucleoid is not distinct but can be found in any part of the cytoplasm, thus the term 'free-floating'.
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Astronomers can learn it's temperature, state, and composition.
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Most scientists believe that for half of Earth's 4.6-billion-year history, the atmosphere<span>contained almost no </span>oxygen. Cyanobacteria or blue-green algae became the first microbes to produce oxygen<span> by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.
this answer came from this website </span>The Rise of Oxygen - Astrobiology Magazine<span>www.astrobio.net/news-exclusive/the-rise-of-oxygen/
it should help</span>
