The Insects - Outline of Entomology 3th Edition - Chapter 4 ppsx

... at the neck, in contact with the cuticle of an adjacent body part (Fig. 4. 2a). The degree of flexion of the joint gives a variable stimulus to the sensilla, thereby allowing TIC 04 5/20/ 04 4 :47 ... controls the mode of reproduction (i.e. either sexual or partheno- genetic). The setting of the biological clock (Box 4. 4) relies upon the ability to detect phot...

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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 ... rat-tailed maggot. Text continues on p. 2 94. TIC11 5/20/ 04 4 :42 PM Page 288 276 Insects and plants Box 11.2 The grape phylloxera An example of the compl...

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... particles. In the case of PDVs, the process is more active and involves the expression of PDV-encoded gene products that directly interfere with the mode of action of hemocytes. TIC13 5/20/ 04 4 :41 PM ... species of insect parasitoids seen above, there are remarkably few insect parasites of other insects, or indeed, of other arthropods. The largest group of endop...

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... distasteful- ness. The mimic gains both from the presence of the protected model and the deception of the observer. As the mimic’s presence disadvantages the model, interac- tion with the model ... produces a build-up of pressure in the reac- tion chamber, which closes the one-way valve from the reservoir, thereby forcing discharge of the contents through the...

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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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... to the surface plane of the wing, especially near the The thorax 41 TIC02 5/20/ 04 4 :49 PM Page 41 The cuticle 25 In soft-bodied larvae and in the membranes between segments, the cuticle must be ... Branches of the anterior and posterior sector of each vein are numbered, e.g. CuA 1 4 . (After CSIRO 1991.) TIC02 5/20/ 04 4 :49 PM Page 43 44 External anatomy thicken...

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... including: the meta- bolism of carbohydrates, lipids, and nitrogenous com- pounds; the storage of glycogen, fat, and protein; the synthesis and regulation of blood sugar; and the syn- thesis of major ... by the plant. By comparison, a macerate-and-flush strategy is typical of Heteroptera, such as mirids and coreids. These insects disrupt the tis- sues of plants or oth...

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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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... range of insects. One of the earliest TIC06 5/20/ 04 4 :45 PM Page 1 64 168 Insect development and life histories Box 6.2 Calculation of day-degrees An outline of a simple method to estimate day-degrees (after ... case when the photoperiodic response of the maternal generation of silkworms affects the eggs of the next generation. The ability of insects to re...

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... 93–1 04. Yeates, D.K. & Wiegmann, B.M. (1999) Congruence and controversy: toward a higher-level phylogeny of Diptera. Annual Review of Entomology 44 , 397 42 8. TIC07 5/20/ 04 4 :45 PM Page 200 the ... 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...

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