Photo by: fox17. Organic halogen compounds are a large class of natural and synthetic chemicals that contain one or more halogens (fluorine, chlorine, bromine, or iodine) combined with carbon and other elements. The simplest organochlorine compound is chloromethane, also called methyl chloride (CH 3 Cl).
Although ticks are commonly thought of as insects, they are actually arachnids like scorpions, spiders and mites. All members of this group have four pairs of legs as adults and have no antennae.Adult insects have three pairs of legs and one pair of antennae.here are two groups of ticks, sometimes called the hard ticks and soft ticks. Hard ticks, like the common dog tick, have a hard shield just behind the mouthparts (sometimes incorrectly called the head); unfed hard ticks are shaped like a flat seed.
There are two broad classifications for the more than 850 species of ticks. They are classed by body structure: soft ticks and hard ticks. Ticks in the Ixodidae family have a hard outer covering, called a scutum. Soft ticks â those without a scutum â belong to the Argasidae family.