This is from Entomology class. Please help by answering all the questions. I app
ID: 220379 • Letter: T
Question
This is from Entomology class. Please help by answering all the questions. I appreciate your help :)
2. Cryptonephric Malpighian tubules
a. are found in some larval Coleoptera and Lepidoptera.
b. allows for the consumption of extremely dry food items.
c. have their distal ends embedded in the rectal wall.
d. Two of the above
e. All of the above
3. The coleopteran suborder that contains the greatest number of species is
a. Polyphaga
b. Myxophaga
c. Archostemata
d. Adephaga
e. None of the above
4. The Holometabola include the following orders:
a. Lepidoptera, Psocoptera, and Coleoptera
b. Coleoptera, Thysanoptera, and Neuroptera
c. Neuroptera, Diptera, and Hymenoptera
d. Diptera, Phthiraptera, and Coleoptera
e. None of the above
10. The dioptric apparatus is composed of
a. the retinular cells, the rhabdom, and the basement membrane.
b. the lens, cone, and the rhabdom.
c. the cone, the rhabdom, and the pigment cells.
d. the pigment cells, the cone, and the lens.
e. None of the above
11. Malpighian tubules function
a. in removing toxins and nitrogenous wastes from the hemolymph.
b. in removing water from excrement.
c. in maintaining chemical homeostasis.
d. Two of the above
e. All of the above
12. Active ventilation
a. occurs only with insects having a closed tracheal system.
b. is commonly found in sedentary insects.
c. is characteristic of insects living in aquatic environments.
d. Two of the above
e. None of the above
Explanation / Answer
2. E. all of the above- The Malpighian tubules are inserted tubular organs in the area between the medium intestine and posterior intestine, which often are free and loose in the body cavity, and in some insects, as already mentioned, the distal end of these tubules found in contact with the wall of the rectum through the perinephric membrane, an arrangement known as ‘cryptonephric complex’. This system facilitates the reabsorption of water and, therefore, is more highly developed in insects that feed on dry substances or live in a relatively dry environment and therefore need to retain water.
3. A- Polyphaga - They may be divided into four groups: the first three, the Archostemata, the Adephaga, and the Myxophaga, contain relatively few families; the majority of beetles are placed in the fourth group, the Polyphaga.
4. c. Neuroptera, Diptera, and Hymenoptera
10. d. the pigment cells, the cone, and the lens.
11. a. in removing toxins and nitrogenous wastes from the hemolymph.The main function of the Malpighian tubules of insects is the excretion of nitrogenous products and other remains of metabolites.
12. d. Two of the above (a and C)The tracheal system is modified according to the specific ecology of the insects, something most strikingly seen in aquatic larvae. Most of them have a closed tracheal system, meaning the spiracles are sealed off, with oxygen diffusing through that seal. To increase the surface area and thus increase the rate of oxygen diffusion, some have extended their tracheal system to outside the body, forming elaborate gills, best seen on the abdomen of larval mayflies, as diagrammed above (Bradley, 2009). The most unique system is that of chironomid larvae who are apneustic, getting their oxygen entirely by absorbing it through their cuticle and through gills. A similar set-up is found in Trichoptera (caddisflies), where this system is synapomorphic.
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