Over many thousands of years Giant pandas have adapted to eating bamboo almost exclusively. For this reason giant pandas are an example of a(n)

/the trachea, commonly known as the windpipe

b would be the right answer

this protocol describes a detailed procedure for intracellular flow cytometry staining.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.