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.
What are ticks? They are not insects but parasites that belong to the same category as spiders, scorpions, harvestmen and mites called arachnids, the joint-legged invertebrates. While only a small number is said to be found in the United States, there are over 800 species of ticks worldwide. During a tickâs nymphal stage, it has 3 pairs of legs but becomes a complete set of eight legs upon reaching adult stage.