The Insects - Outline of Entomology 3th Edition - Chapter 3 potx

... mixture of hormones, including JH-I, JH-II, JH- III, and JH-0. The occurrence of mixed-JH-producing insects (such as the tobacco hornworm, Manduca sexta) Box 3. 1 Molecular genetic techniques and their ... including: the meta- bolism of carbohydrates, lipids, and nitrogenous com- pounds; the storage of glycogen, fat, and protein; the synthesis and regulation of blood su...

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... numbers of insects is the role of sexual selection in the diversifica- tion of many insects. The propensity of insects to become isolated in small populations (because of the fine scale of their ... classification and their roles in our economic and wider lives. First, we outline the field of entomology and the role of ento- mologists, and then introduce the...

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... defensive and other com- pounds are products of the epidermis, which is a near- continuous, single-celled layer beneath the cuticle. Many of these compounds are secreted to the outside of the insect ... pair of gonostyles (the third valves) derived from the distal part of the appendages of segment 9 (and homo- logous with the styles of the apterygotes mentioned...

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... across. The field of view of each ommatidium differs from that of its neigh- bors and together the array of all ommatidia provides the insect with a panoramic image of the world. Thus, the actual ... insensitive to the wing tone of males of their species. Neither can the male detect the wing tone of immature females – the Johnson’s organ in his antenna respond...

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... transfer of sperm via the insertion of part of the male’s aedeagus (edeagus), the penis, into the repro- ductive tract of the female. In males of many species the extrusion of the aedeagus during ... oviposition in insects. 5.1 BRINGING THE SEXES TOGETHER Insects often are at their most conspicuous when syn- chronizing the time and place for mating. The flas...

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... above, the value of K can be calculated for each of the experimental tem- peratures from 14 to 36 °C: Temperature (°C) 14 16 20 24 28 30 32 34 36 K 1008 2211 2 834 2921 2866 2755 2861 34 15 38 82 Thus, ... further discus- sion of the actions of eclosion hormone). Apolysis at the end of the fifth larval instar marks the beginning of a prepupal period when the d...

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... as wings held roof-like over the abdomen, fore wings either membranous or in the form of tegmina of uni- form texture, and with the rostrum arising ventrally close to the anterior of the thorax, ... or mistaken. The fore-wing-derived halteres of strep- sipterans are gyroscopic organs of equilibrium with the same functional role as the halteres of Diptera (although...

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... systems. Annual Review of Entomology 35 , 249–69. TIC09 5/20/04 4:44 PM Page 237 232 Ground-dwelling insects The Archaeognatha and Zygentoma represent the sur- viving remnants of a wider radiation of primitively ... complex circulation of air through the passageways of the nest, as illustrated for the above-ground nest of the African Macrotermes natalen- sis in...

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... hundreds of kilometers from shore in the Pacific Ocean. The dis- tribution of these insects coincides with mid-oceanic accumulations of flotsam, where food of terrestrial origin supplements a diet of ... proponents of the pre- ferred exite–endite theory speculate that the progenitor of the pterygotes had aquatic immature stages. Support for the latter hypothesis app...

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... Interpreting the early evolution of the angiosperms is contentious, partly because of the paucity of fossilized flowers prior to the period of radiation, and also because of the apparent rapidity of the ... native range. The host-specificity of potential control agents must be tested, either inside or outside the country of introduction and, in the former case,...

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