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英语学*2008-2009学年度陈埠中学七年级生物第一学期期中考试试卷

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2008-2009 academic year Chen port middle school grade seven biological first semester mid-term exam papers (time: 100 minutes, out of 100 points) First, the choice of title (2 points per title, a total of 50 points) 1 we learn the text "Little Tadpoles Looking for mother", mainly to show the characteristics of the biological () A. propagation B. growth D. growth and reproduction C. stress 2 to determine the "August sweet scented osmanthus" ecological factors are () A. temperature B. moisture C. light D. humidity 3. Four students to carry out the following steps: a mirror facing the sun light to view reached maximum brightness; observed B hair, opening eyes, observation of the left eye, right hand drawing; C found eyepiece dirty the, then picked up the toilet paper to clean; Ding using low magnification objective lens has seen cells, still felt fuzzy, so try to adjust the fine focusing screw. The correct operation is (). A. a, B, C B. B, D C. a, B D. B, C 4 you want to investigate the density of grass on a piece of grass, which is the best way to take the survey method () A. is not a point of the number of grass, the amount of B. grid after the grid to calculate the cumulative number of C. point sampling survey, the average value of D. in estimating 5 the following is an ecosystem A. Greater Khingan Range B. the Yellow River carp C. Kunming Lake in the biological D. grassland on the sheep 6 tissue is covered on the inner surface of the body surface and in the lumen wall of the body. A. muscle tissue B. epithelial tissue D. connective tissue C. nerve tissue 7 the largest ecosystem on earth is () A. farmland ecosystem C. forest ecosystem B. grassland ecosystem D. biosphere

8 the decrease of the earth's environmental quality, the main reason for the imbalance of the ecological balance is () A. plants (i.e. producers) slower growth in B. deforestation C. nature of the animals increased over the rapid growth of D. population 9 the following statement does not belong to the biological impact on the environment is () A. was launched when the adult Mantis like bright flowers B. Mount Huangshan pine and other plant roots can secrete acidic substances, so that the decomposition of rock C. soil has a large number of microorganisms, can make the content of mineral elements in the soil to maintain a balance Carbon dioxide in the atmosphere of D. increased, resulting in greenhouse effect . Xiao Ming the carbon ink pen and drop a little bit to Paramecium culture liquid, after a few minutes, made temporary slide under the microscope observation found some Paramecium a structure has been dyed black. The name of this kind of structure is () A. nuclear B. vacuole C. food bubble D. bubble 11 water and inorganic salt can enter the cell, and harmful substances can not enter the cell, which is mainly due to (). The protective effect of B. cell wall broke the support function of A. cells C. cytoplasmic mobility D. cell membrane has the function of controlling the material in and out of the cell 12 Paramecium in other biological food was the main reason for the () The body of A. is a cell that has no chlorophyll in B. body. C. cell structure is not complete D. can not be metabolism 13 with a microscope to observe the longitudinal section of the root tip, with 10 x of the objective observation, and then replaced with 40 x of the objective lens, if you do not adjust the quasi focal helix, then the vision of the clarity and brightness changes are: ().

A. clear, dark B. fuzzy, Bian Liang C. clear, Bian Liang D. fuzzy, Bian Liang () 14 the following is true of the description of the chromosome. The main component of the A. chromosome is located in the cytoplasm of the B. chromosome, which is DNA and protein. The number of chromosomes in somatic cells of different individuals of the same species of C. is not necessarily When D. nucleus division, the chromosomal changes are not obvious. 15 the cell's life can not be separated from the material and energy, in animal cells and plant cells are present in the energy converter is (). A. nuclear B. vacuole C. mitochondrial D. chloroplast 16 in the following example, the structural features of the organ that do not belong to the organ are () A. heart is composed of cardiac muscle cells B. blood from blood cells and plasma composition The C. spinal cord is mainly composed of nerve cells, and the D. salivary gland is mainly composed of secretory cells. 17 the following organisms must be parasitic in the living cell to have the life activity is () A. B. C. D. virus bacteria fungi Chlamydomonas Wang Fang 18. Students in onion scale leaves epidermal cells temporary mount, in the view of the clearly see the several large and round and the edge of the black object, the structure may be () A. B. C. D. bubble water plant cell vacuole 19 bananas are sweet, because the flesh of the banana contains sugar, which is present in the flesh of the banana. All the structures of C. cells within the cytoplasm of A. in the B. nucleus are in the vacuoles of D. 20 the following statements about the relationship between life and the environment are correct.

A. can not be separated from the environment, but does not affect the environment B. biological and environmental interaction, mutual influence C. isolated from each other between the biological and the environment, do not affect the D. environment can not restrict the existence of biological 21 related to the description of the system of animals, the right is () The sum of all the organs in a part of the A. body. B. in vivo physiological functions and the structure of the continuous sum of the various organs C. in vivo function has some kind of connection of the sum of multiple organs A system consisting of a number of organs that can continuously complete one or more physiological functions in D.. 22.2003 years in the first half, atypical pneumonia to our country and the world has brought a huge disaster, by the tireless efforts of scientists all over the world, has identified the cause of the disease is a new type of virus. The main reason to think that this virus is a living creature is () A. its constituent elements in the carbon B. it has a complete cell structure C. it can be through the proliferation of offspring D. it can be independent of the metabolism In view of 23 spots, the judgment method of loading the stain is in the () A. rotation mirror B. mobile loading C. D. rotation of an objective lens rotating the eyepiece 24 tobacco contains a substance that is harmful to the human body, called nicotine, which is mainly found in tobacco cells. A. cell wall C. cytoplasm B. cell fluid D. nucleus 25. With a microscope observation of oral epithelial cells and view the central cell and overlapped seriously, and at the bottom left of the oral epithelial cells dispersed, it should be (threading) A. right to the bottom left of the mobile B. mobile D. mobile C. real right below Friendship tip: Please fill in the answers to the questions in the following table, do not forget Oh! 1 2

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two, comprehensive title (50 points) 1 the structure of the following human body and the corresponding main organization with a line (4 points) A. blood A. epithelial cells B. epidermal B. muscle tissue C. C. of biceps connective tissue D. nerve tissue of D. spinal cord 2 (5 points) read the following information to answer the question: Egypt's Aswan High Dam, although Egypt has brought a wealth of electricity, but because of the dam blocking the fertile silt, so that the lower reaches of the Nile land barren, the riverThe reduction of nutrients in the Nile Delta and the Mediterranean Sea fishery production is affected by the decrease in the amount of Egyptian fishing. (1) from the regional point of view, all kinds of ecological system is also related to each other. What ecological system was built in Aswan High Dam (at least three) (3 points). Answer: ______________________________________________________. (2) analysis of the above examples, what role do you think the human beings should play in the biosphere (2 points) Answer: ___________________________________________________________. 3 below is a diagram of the temperate grassland ecosystem, according to the graph answer: (10 points) (1) a _______ food chain food network, one of the longest one is: ____________________ _____________________________________ (represented by text and arrow). (2) the ecological system in the rabbit with grass, snake and rat relationship is the relationship,

the relationship between the owl and the fox to the relationship. (3) the ecological system in various organisms of life activities need energy sources in the plant by fixed solar energy. With the characteristics of energy in the process of flowing along the food chain in the _______________________________. (4) if the number of snakes is reduced, which can change the number of the species? _________________________________________________________________. (5) the ecological system diagram is not expressed, but is essential for biological, role which they play in the ecosystem. . 70 centimeters long, 30 centimeters wide box, put a layer of wet soil at the bottom of the box, is bounded by the center line of the box, one side of the upper cover board, on the other side of the cover glass plate, this box can be the formation of two types of light and shade environment. In cartons into 20 pillbug. (6 points) (1) to explore the pillbug is in the dark or bright environment in life should box will be placed in the environment, assuming pillbug adapted to living in the dark environment, to cover one side of the glass plate has become the experimental. (2) from the experimental device, pillbug should suitable in dry or humid environment in life? ______________________________________________________________. Whether the experimental device on pillbug is not suitable for living in a dry environment __________________? Why ______________________________________________________?. (3) known pillbug suitable living in Yin tide in the environment, we will device is placed in a bright environment, the box cover board side into the vinegar, after a period of time found Armadillidium vulgare were shifted to cover one side of a glass of sweet clover. This experiment shows: _________________________________________________________________________. 5 the following figure shows the cell and the two kinds of organelles, cells in a molecular fragment, a structure in the cell. Please answer the question according to the picture: (6 points) (1) Figure 1 in plant cell specific energy converter [6] for _______________. (2) molecules are shown in Figure 2 is called ________, it mainly exists in Figure 1

[in]______________. A specific genetic function of the molecular fragments called _______. (3) the structure shown in Figure 3 is called _________, which is mainly composed of DNA and __________ two elements. 6 carefully observe the following questions, please answer the following questions according to your observation: (11 points) (1) of rice straw is cut into 1-inch pieces and put it in a filled with natural water in the beaker, after 10 days or so, the water appears a layer of gray white film, opened this layer film carefully observe the upper water swimming of quickly small white spots, that is, under the microscope and its shape is like. (2) the structure [] has the role of sports in the distribution of surface is a systemic table B films, surface in a circle C, oral groove D, body front end). (3) the food enters the body by]________, the formation of global food, undigested food residue excreted through []______. A food vacuole contains about ______ bacteria, so Paramecium has a certain effect on the _________. (4) []_______ can nitrogen waste collection in the body too much. Enter the ________ [], the holes on the membrane surface discharge in vitro. (5) inhalation oxygen and emit carbon dioxide is]___________. 7 experimental study: (8 points) "Wrigglers" is the mosquito larvae, suitable for living in the water. Several students of larvae of life whether to air "over the question of endlessly: some believe that need air and some that do not need the air to breathe. Ask you to design an experiment to explore the problem according to the following figure. (after a period of time a breakdown or death) (after a period of time of a normal life) (1) questions: _________________________________________? (2) make assumptions: _________________________________________. (3) experimental design: The _________________________________________; The _________________________________________;

The _________________________________________; The _________________________________________. Expected results: a wriggler decline and death after a period of time; Otsuichi period of time after the normal life of larvae. (4) try to analyze the reason of the result: _________________________________________ (5) conclusion: _________________________________________ Reference answers First, the choice of title (2 points per title, a total of 50 points) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 B C B C A B D D A C D B D B

C 16 17 18 19 20 21 22 23 24 25 B B B D B D C B C B two, comprehensive title (50 points) 1 (4) Ac B a Cb Dd 2 (5 points) (1) for example: river ecosystem, marine ecosystem, farmland ecosystem, etc. (2) human beings should use and protect the resources of the biosphere properly (the meaning is right). 3 (1) 9 grass, grass eating insects, spiders, frogs, snakes, owls (2) predation competition (3) photosynthesis one-way flow, energy decline (4) the number of owls will be reduced; the number of frogs and rats will be increased. (5) bacteria and fungi to decompose the remains of plants and animals 4 (1) light on the return of the experiment (2) the humid environment can not because the experiment did not put the drying conditions as the experimental variables to study. (3) pillbug of vinegar sting can react (or other reasonable answers)

5 (1) chloroplast (2) DNA gene (3) chromosome, protein 6 (1) of Paramecium inverted Elephantopus (2) 3 A cilia (3) 5 ditch 7 bubble anus 30 sewage purification (4) 1 collecting tube 2 expansion bulb (5) 4 surface membrane7 (1) of the larvae in the water needs air? (2) the life need air in water wrigglers. (3) set up the control experiment; divide two groups The emphasis on the same point: material (number of larvae), equipment (large beaker, an equal amount of water, and the environment) Emphasize variables (with or without wire) The observation after a period of time (4) because of the surface water dissolved oxygen rich, a barbed wire barrier in larvae cannot reach the surface, hypoxia. (5) the life need air in water wrigglers.




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