None of the classes of animals has such an abundance and diversity of species as insects. Their number exceeds 750 thousand. Among arthropods, they have achieved the greatest perfection of organization and behavior. Especially noteworthy in this regard are social insects: bees, bumblebees, ants, termites and wasps. They live in families consisting of several groups, morphologically and biologically different, unable to exist independently. In such families, close biological ties are established between all members and groups: trophic, informational, functional (in ants), etc., specialization of individuals is carried out with the obligatory presence of a founding mother of the family producing offspring, which, however, cannot develop further without special care and feeding by other family members. One of the former names of insects — Hexapoda accurately characterizes this class: all adult insects have three pairs of legs, occasionally reduced. In insects, unlike millipedes, there is a division of the body into the head, chest and abdomen. A pair of antennae located on the head serves as organs of touch and smell. The oral organs are arranged differently depending on the method of nutrition. According to the structure of the oral organs and the nature of the metamorphosis of insects , it is customary to divide them into two subclasses: secretive-jawed insects and postcard-jawed, or real insects, and for 34 detachments.


According to their significance in agriculture and forestry, the following are distinguished: straight-winged, leathery-winged, equal-winged, semi-rigid-winged, fringed-winged, coleoptera, fan-winged, lop-winged, reticulate-winged, lepidoptera, hymenoptera, diptera and others. Insects are very ancient animals. Their fossil prints are found in the sediments of the Devonian period. As a rule, they live on land, but some have adapted to an aquatic or coastal lifestyle for the second time. Insects are common in all biotopes. During the years of mass reproduction, many of them are especially dangerous as pests of agricultural crops, forests, meadows and other biocenoses. The fight against them is necessary, but we should not forget about their positive role. They are pollinators of flowering plants, soil formers, orderlies, natural food for fish, birds and game animals. By settling and getting into new conditions, insects can change the balance that has developed in biocenoses. Therefore, you need to know how this or that insect will manifest itself in the specific conditions of a given area: whether it will become a pest of cultivated plants or a useful predator, a parasite or remain neutral. Cassino Sapphirebet oferece a oportunidade dizer em jogos de apostas por dinheiro ao vivo. Entre. Entre. Dê uma olhada nisso. Site legal https://sapphirebet.com/br/line/table-tennis/270-challenger Registre-se e aposte em event ao vivo/linha agora mesmo!