Plants prefer to absorb nitrogen in what form

Hope this helps. Nitrogen assimilation in plants. Plants absorb nitrogen from the soil in theform of nitrate (NO3−) and ammonium (NH4+). In aerobic soils where nitrification can occur, nitrate is usually the predominant form of availablenitrogen that is absorbed. ... Ammonium ions are absorbed by theplant via ammonia transporters.

They prefer to absorb N (nitrogen) in gas from .And I wouldn’t say it is a preference but availability,the availability of nitrogen in the air is almost 80% and since plants already absorb other gases like CO2 (g) from the air they also in absorb N (nitrogen).

The answer is option b.

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.