Answer: Selection occurs within generations; evolution occurs between generations. All four of Darwin's postulates are true for the medium ground finch population on Daphne Major. Darwin's theory therefore predicts a change in the composition of the population from one generation to the next. In biology, evolution is the change in the inherited traits of a population from generation to generation. ... Natural selection is a process that causes heritable traits that are helpful for survival and reproduction to become more common, and harmful traits to become more rare.
During swallowing, the pharynx changes from airway to a food channel channel.During mastication, the food bolus aggregates in the pharynx before swallow commencement.
<em>The structures in the oral pit, pharynx and larynx serve various capacities in breathing, talking, rumination and swallowing,
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The nasal cavity, The pharynx is the piece of the throat behind the mouth and larynx the cylinders going down to the lungs and stomach .
Nourishment and fluid pass in reverse into the throat on their way to the stomach. Air pass out through the larynx and into the trachea.
