Broader definitions of chemicals or chemical substances can be found, for example: the term 'chemical substance' means any organic or inorganic substance of a particular molecular identity, including â (i) any combination of such substances occurring in whole or in part as a result of a chemical reaction or occurring in nature.
The major groups of worms include various species of flatworm, annelid, ribbon worm, spiny-headed worm, and aschelminth. Worms typically have an elongated, tubelike body, usually rather cylindrical, flattened, or leaflike in shape and often without appendages.
(5) The wormâs life span is estimated to be 4 - 8 years. b. Morphology (1) Adults-females: 35 to 50 mm long, anterior two-thirds is long and threadlike, then it expands into a broader posterior; males: 30 to 45 mm long, shape similar to female but exhibiting a very strong (360 or more degree) curvature of tail.