A gene mutation can occur because of environmental factors. If a person is exposed to UV lights it can cause a mutation to happen
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Someone can say that the quality of life is a concept for many reasons. If you are going through a gard time or are miserable, you are not going to say that life is great and its about the quality of life. Therfore making the statement that it is just a concept. If you are living a successful life, quality will be everything to you. It is just a concept because the human brain agrees with something based on their particular situation. It is a subjective concept because there is no certain and set-in-stone answer.
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Answer: By having variety in what you eat, you give your body a balanced amount of different properties your food has.
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I was adopted when I was a baby
Some psychotropic medications can result in lucid dreams, it has also been proposed that some forms of fungi can enhance ones capacity to be able to interact with dreams but this is incredibly dangerous in practice. Usually attaining a healthy amount of sleep (8hrs a night) as well as being aroused before you adequately release from NREM sleep, can help you recall a dream.