Nitrogen is present in the environment in chemical forms like A) Organic nitrogen - containing compounds
B) Ammonium ions
C) Nitrate
D) All of the above

An egg, or a sack of flour

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.

Everything that you need in a lab is in your lab