"Order" - what is it, definition of the term
The term denotes a documented request issued by a purchaser to acquire specified goods or services, typically detailing quantities, specifications, pricing, delivery terms, and payment conditions; it creates a binding obligation for the supplier to fulfill the request according to the stipulated parameters.
Detailed information
Ticks belong to the taxonomic group Ixodida. Members are ectoparasites of vertebrates, possess a capitulum bearing chelicerae and palps, and undergo three life stages: larva, nymph, adult. The group includes families Ixodidae (hard ticks) and Argasidae (soft ticks). Hard ticks have a scutum covering the dorsal surface; soft ticks lack this structure and feed for shorter periods.
Bugs are classified within the group Hemiptera. Defining features are piercing‑sucking mouthparts, hemelytra (forewings partially hardened), and a dorsal scent gland. The group comprises suborders Heteroptera (true bugs) and others such as Auchenorrhyncha and Sternorrhyncha. Aquatic and terrestrial representatives display diverse feeding habits, ranging from plant sap extraction to predation on other insects.
Lice fall under the group Phthiraptera. They are obligate ectoparasites of birds and mammals, characterized by reduced wings, strong claws adapted to host hair or feathers, and a life cycle limited to the host environment. Two major divisions exist: Anoplura (sucking lice) and Mallophaga (chewing lice). Morphological adaptations enable permanent attachment and efficient blood or tissue consumption.
Fleas are members of the group Siphonaptera. They are wingless, laterally compressed insects with powerful hind legs for jumping. The group includes families such as Pulicidae and Ceratophyllidae. Fleas feed exclusively on blood, possess a proboscis for piercing host skin, and serve as vectors for various pathogens. Their life cycle comprises egg, larva, pupae, and adult stages, with environmental stages occurring off the host.