Which situation would most likely result i the greatest change in gene frequency in a population ?
a) a single individual leaves a large population
b) a large population loses a few individuals
c) a bird has two alleles for a certain feather color
d) a predator eats one phenotype rather than another for a year

D) A predator eats one phenotype rather than another for a year

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.