If there are 400 dark moths in a population of 1200 and 800 light moths, what are the frequencies of each trait?

The dark moth frequency is 1/3 and light moths are 2/3. you can conclude that light moths are twice more common then dark moths.

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.

4, two dominant and two recessive