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.
An annelid is a segmented worm. An annelid is a type of worm with an oval-like body. They are in the phylum Annelida, which consists of about a thousand different types of wor â¦ ms. This phylum also contains the earthworm.n annelid is a segmented worm. An annelid is a type of worm with an oval-like body. They are in the phylum Annelida, which consists of about a thousand different types of wor â¦ ms. This phylum also contains the earthworm.