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.
The inchworm (âinch wormâ) is a type of caterpillar, and belongs to a family of moths called Geometridae, a group with over 1,200 species native to North America. Also called measuring worms, spanworms, loopers and cankerworms, inch worms are larvae, and are usually considered pests because of the damage they inflict on trees, plants and shrubs.