Which of the following is not true about mutations? a) mutations are chance changes in the dna sequence of bases and may code for a different amino acid b) mutations may cause variations that are adaptations c) radiation and x-rays may cause mutations d) mutations are always harmful

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.