A control experiment is... a. is one in which a lead scientist controls a group of scientists conducting an experiment.

b. Is always conducted using one large, random sample group.

c. Is one in which the condition suspected to cause the effect is compared to the same situation without the suspected condition.

d. Rarely provides the answer to a question posed by a theory

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.