In poetry, a stanza is a division of four or more lines having a fixed length, meter or rhyming scheme. Stanzas in poetry are similar to paragraphs in prose. Both stanzas and paragraphs include connected thoughts and are set off by a space. The number of lines varies in different kinds of stanzas but it is uncommon for a stanza to have more than twelve lines. The pattern of a stanza is determined by the number of feet in each line and by its metrical or rhyming scheme.
BIOLOGICAL TOXINS. Toxins are defined as any toxic substance of natural origin produced by an animal, plant, or microbe. They are different from chemical agents such as VX, cyanide, or mustard in that they are not man-made.
Natural drugs obtained from plants and animals are called drugs of biological origin and are produced in the living cells of plants or animals. Pharmacognosy is the study of crude drugs obtained from plants, animals and mineral kingdom.Even though the science of pharmacognosy is practised since a very early period, the term pharmacognosy was first used by Seydler, a German scientist, in 1815 in his book Analecta Pharmacognostica.he Latin name of the plant or animal is called its botanical or zoological source. The family to which this plant or animal belongs is also mentioned, e.g. Vasaka leaves are obtained from Adhatoda vasica plant; family Acanthaceae. Vasaka leaves are included in the Indian pharmacopoeia and are called official leaves.