Five species of frogs that live in separate habitats within 5 non-overlapping 1 point ranges along the Mississippi River share a common ancestor. Which process is most likely responsible for the formation of these five distinct species? *

Hmmm i'm not sure about this one

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.