A tracheotomy is performed if enough air is not getting to the lungs, if the person cannot breathe without help, or is having problems with mucus and other secretions getting into the windpipe because of difficulty swallowing. There are many reasons why air cannot get to the lungs.
Trending Now. Answers. Best Answer: Yes, the smallest unit of evolution is the population. The reason is, the techical definition of evolution is change in allele frequency. You have to have a population in order to run the statistics to measure if there has been a change. Remember, a population does not necessarily mean all animals of one species.
Keeping the entropy low for the defined system is not the only consideration in sustainable development. A very low entropy state is one of identical molecules in a matrix equally spaced apart; not a viable development situation. In addition to low entropy one also needs a certain degree of complexity or diversity. (See Signs of Life: How Complexity Pervades Biology.) One only has to look at nature to see low entropy and complexity work together. (See Biomimicry.) What is needed is low entropy and high complexity.