Viral vaccines have been produced using viruses grown by all of these methods except grown on agar plates grown in animal cell culture isolated directly from humans grown in animals grown in bird embryos

One of the methods and it could only be used once

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.

C. a mature ovule of a plant.