华南农业大学考试试卷（A卷）标准答案2017-2018学年第1学期　考试科目：　蚕体解剖生理（双语）　考试类型：（闭卷）考试 考试时间：120 分钟学号姓名年级专业题号一二三四五总分得分评阅人、、填空（共10小题，每题2分，共20分）Fill in the blanks with correct words. 10 topics with each 2 points sum to20 points.1.Insects like silkworms that undergo complete metamorphosis have a typical lifecycle including eggs , larvae ,pupae , and moth (adult) stage.2. The silkworm is a species of insecta or arthropods （纲或门）that has 13 segments, 9 pairs of spiracles, and 5 pairs of abdominal feet.3. Correctly fill the blanks below that represent corresponding composition of silkworm brain.1 Brain2 Subesophageal ganglion3 Corpora cardiaca4 Corpora allata5 Lateral pharyngeal nerve cord6 Recurrent nerve4.The six most common types of hemocytes in silkworm are prohemocytes,得分plasmatocytes, granulocytes, spherulocytes, oenocytoids, and coagulocytes.rvae of Lepidoptera tend to have a very high midgut pH, varying from about 8~10 . However, the midgut pH of silkworm is 9.42 .6.Chemoreceptors of the silkworm including contact receptors: gustatory or taste receptor and olfactory receptors.7.The silkworm brain consists of three fused ganglionic masses: the protocerebrum, the deutocerebrum, and the tritocerebrum.8.The general anatomy of the male Bombyx mori internal organ, could be consist of the paired testes, the vas deferens, the ejaculatory duct and accessory glands.9.Insect cellular immunity includes phagocytosis, nodule formation, encapsulation and aggregation.10.At the end of gastrulation, there is an outer layer cells named ectodermal and an inner layer of cells termed mesentodermal layer.得分、、正误题（共10小题，每小题1分，共10分），正确的标记√，错误标记×。

True-false items. 10 items with each 1 points sum to 10 points. True label tick and false label cross.11．Some insects swallow air or swallow water to expand the gut and split the old cuticle. ( √ ) 12. The silkworm is the only typical insect that has stemmata at the larval stage and compound eyes at the moth stage. ( × ) 13. The central body complex in deutocerebrum appears to be involved in "arousal" behavior. ( × )14. Stimuli cause changes in membrane permeability of excitable cells. ( √ )15. Diapause termination usually depends on reception of token stimuli concerning the physiological conditions. ( × )16. Panoistic ovarioles do not have nurse cells. ( √ )17. In Bombyx mori, biting responses are stimulated by β–sitoaterol, leafaldehyde and linalool . ( × ) 18. The antenna of male commercial silk moth, B.mori, send many impulses persecond into the brain even when not stimulated by pheromones. ( √)19. Urine formation in Malpighian tubules relies on concentration of saline. ( × )20. Allelochemicals influence the behavior or physiology of a members of a different species than that of the producer. (√)得分、、理解题（阅读下列短文回答问题，共5小题，10分）。

Comprehension (Read the following 2 paragraphs, answer the questions, 10 points).Traditionally, silk proteins are thought to be two phased semi-crystalline polymers containing both crystalline and non-crystalline regions. The crystalline regions have been identified as rigid, tightly packed anti-parallel β -pleated sheets. The β -sheets are either poly-Ala, or poly-Gly-Ala, interlocking with adjacent chain via hydrogen bonds. The non-crystalline domains are often described as poorly orientated, randomly coiled sections of the peptide, or ‘amorphous’.Fibroin from the silkworm B. mori is composed of two chains (H-fibroin [heavy] and L-fibroin [light]) linked by a disulfide bond. Another component of the protein is P25, which has been suggested to act as a chaperone to assist in the transport and secretion of H-fibroin. H-fibroin, L-fibroin and P25 are thought to be assembled in the ratio 6:6:1. This assembly appears to be standard in silk secreted by members of the lepidoptera order, with the exception of the saturniidae family, where L-fibroin andP25 are absent.Silk fibroin can exist in a number of different conformational states: Silk I andsilk II. Silk II is the solid fibroin that can be found in the spun silk thread, while silk I is the dissolved, meta-stable form stored in the silk gland.21．Which statement is correct? ( B )A. The crystalline regions of silk proteins are poly-Ala and poly-Gly-Ala.B. Saturniidae family is also an order of lepidotera.C. Silk I and Silk II are different silk fibroin conformational states, which can befound in the silk gland.D. Two chains of fibroin from the silkworm B. mori are assembled by hydrogen bonds.22. “Amorphous” in the text means ( A )A. non-crystalline.B. poorly orientated.C. coiled sections.D. peptide23. What kinds of linkage can be detected in silk fibroin? ( C )A. hydrogen bonds.B. disulfide bond.C. both hydrogen and disulfide bond.D. chaperone.Usually, the egg nucleus is diploid until the entry of the sperm stimulates meiotic division leading to the haploid egg nucleus. Union of a sperm nucleus with the egg nucleus produces zygote and stimulates the zygote to begin division. Ultimately, zygotic division in all insect eggs produce large numbers of nuclei lacking of cell membranes but each surrounded with a small field of cytoplasm, called polar bodies.24. When the haploid could be founded in egg nucleus? ( A )A. the first time of meiotic division.B. all meiotic division.C. the zygotic division.D. the final division.25. Zygotic division produce ( C )A. One oocyte.B. One oocyte and one polar body.C. One oocyte and many polar bodiesD. Many polar bodies.得分四、翻译题（中英文互译，4小题，共20分）。