Bees see blue and purple best. over time, some plants have developed blue flower petals and a place for bees to land. how might these features the plant?

These plants will have pollen from the collected more frequently than a plant color yellow. The plant has a way higher chance of survival rather than a plant that is not in favor of the bee's sight color and that would probably die because the bee would collect no pollen from because it does not catch its attention.

This helps the plant cause the bees leave pollen which the plant need and that's why part of the plant needs it to be alive and it will make the plant change

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.