The synthesis of Vitamin D decreases with age. This is <span>due because of a fall in 7-dehydrocholesterol levels.</span>
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Answer: a medicinal preparation for inhaling.
serving for inhalation
Explanation:
Innate is a general, nonspecific immunity against any pathogen trying to enter the body.
Random sampling means that members of a 'population' have equal chances of being selected. To carry out this type of sampling, you will need to use a table of random numbers.