Types of natural selection: Different types of natural selection can impact the distribution of phenotypes within a population.In (a) stabilizing selection, an average phenotype is favored.In (b) directional selection, a change in the environment shifts the spectrum of phenotypes observed.In (c) diversifyingselection.
Ok your thyroid gland also contains selenium
Its B cuz the definition is <span>one of two or more alternative forms of a gene.
</span>
Answer D) : from testing the starch by iodine