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.
TERC Answer: All ticks (including deer ticks, dog ticks, Lone star ticks, etc.) come in small, medium and large sizes. The smallest size, called larvae, are nearly microscopic. The middle stage, called nymphs, are medium sized although most people would call them tiny. Nymphs of all ticks are about the size of a pin head in their un-fed state. Then there are the large size or adult stage ticks. Even the adult stage of Blacklegged ticks (aka deer ticks) that transmit Lyme disease are relatively large.