secondary metabolites are chemicals produced in one part of a plant that affect the growth and response of other parts.
secondary metabolites are chemicals produced in one part of a plant that affect the growth and response of other parts.
chemicals produced in one part of a plant that affect the growth and response of other parts?
secondary metabolites
section::::function.:hormones.









































a hormone is any of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour. hormones have diverse chemical structures, mainly of 3 classes: eicosanoids, steroids, and amino acid/protein derivatives (amines, peptides, and proteins). the glands that secrete hormones comprise the endocrine system. the term hormone is sometimes extended to include chemicals produced by cells that affect the same cell (autocrine or intracrine signalling) or nearby cells (paracrine signalling).
endocrine system
commercial classification of chemicals









































following the commercial classification of chemicals, chemicals produced by chemical industry can be divided essentially into three broad categories:









































bullet::::- commodity chemicals: are chemicals produced in large quantities and in general their applications can be traced back to their chemical structure; for this reason, two commodities produced by two different suppliers but with the same chemical structure and purity are almost identical and they can be easily interchanged; they are produced by continuous plant and in general their cost is relatively low; examples of chemical commodities are ammonia and ethylene oxide;
commercial classification of chemicals