Biology of Grade 7
Proposer: Tang Jing Examiner: Liu Deyun
Note to candidates: the exam paper of this subject contains two major questions, out of 1 points, and the test time is 6 minutes.
the total score of item one, two, three
score
1. Multiple choice questions (fill the correct answers in brackets, ***1×4=4 points)
1. The following belong to all living things * * * and have the following characteristics: ()
A. All living things need to inhale oxygen. Exhaled carbon dioxide B, organisms can produce organic matter
C, organisms are all made of cells D, organisms can reproduce offspring
2, which of the following is not a single-celled organism ()
A, paramecium B, jellyfish C, Chlamydomonas D, yeast
3, if the image observed under the microscope is at the upper right of the visual field, In order to adjust the object image to the center of the field of vision, the slide specimen should be moved to ()
A, upper right B, lower left C, upper left D and lower right
4. Compared with animal cells, The unique structures of plant cells are ()
A, cell membrane B, cytoplasm C, chloroplast D and nucleus
5. The energy converters that animals and plants have are ()
A, chloroplast B, chloroplast and mitochondria C, mitochondria D and nucleus
6. The similarities between corn seeds and kidney bean seeds are ()
A, nutrients stored in cotyledons B, endosperm
C, embryo and seed coat D, nutrients stored in endosperm
7. The following are correct about human body composition: ()
A, tissue → organ → system → human body B, Cell → organ → tissue → human body
C, cell → tissue → system → human body d, cell → tissue → organ → system → human body
8. The ecosystem belongs to ()
A, a sheep B, a flock of sheep C, grassland D, all sheep on grassland
9, and the function of the catheter. Transport water and inorganic salt B from top to bottom, transport water and inorganic salt
C from bottom to top, transport organic matter D, transport various nutrients in the body
1, some tall trees, the water absorbed by roots can be transported upward to the top of plants, The main driving forces come from ()
A, photosynthesis B, coaching C, transpiration D and respiration
11. The following food chains are correct: ()
A, grass → grasshopper → insect-eating bird → snake → eagle B, eagle → snake → insect-eating bird → grasshopper → Snake → eagle → insect-eating bird → grass → grasshopper D, grass → grasshopper → insect-eating bird → eagle → snake
12. In the structure of root tip, there are ()
A, root cap B, meristem C, elongation D and mature area < P >. They all belong to the vegetation problems that China is facing ()
A, China's forest resources are very poor b, China's forest coverage rate is low, only 16.55%
C, China's long-term utilization of forest resources is unreasonable, and the forest ecosystem shows a declining trend
D, due to overgrazing, grassland degradation and desertification are serious in China. It is a country with serious land desertification in the world
14. The following basic conditions are not necessary for the survival of plants, animals and microorganisms, including ()
A, nutrients B, sunlight, C, air and water D, soil
15. After flowering, What two main processes must be completed before fruits and seeds can be formed ()
A, flowering and pollination B, pollination and fertilization C, flowering and fertilization D, self-pollination and cross-pollination
16, how many chromosomes are there in human cells ()
A, 23 B, 46 C, 69 D, 18
17. The fertilization process of green plants is ()
① Sperm and egg cells combine; ② Pollen tube enters ovary; ③ Pollen tube enters ovule
④ Pollen germinates; ⑤ The end of pollen tube breaks to release sperm
A, 42351B, 4251C, 12345D, 423518, The largest ecosystem on the earth is ()
A, forest ecosystem B, biosphere C, marine ecosystem D, urban ecosystem
19. The reason why poplar stems can be continuously thickened is that they have ()
A, cambium B, phloem fiber C, xylem D, bark
2, and these morphological structures are similar. The cell groups formed by the aggregation of cells with the same function are called ()
A, tissue B, organ C, system D, cells
21, and in the structure of plant stems, The function of sieve tube is ()
A, transport water b, transport organic matter c, transport inorganic salt d, transport water and organic matter
22. What peach blossoms are eaten by pests and cannot develop into fruits and seeds ()
A, perianth b, stamen c, pistil d and nectary
23. In all circles of the biosphere, The biosphere with the most species is ()
A, atmosphere B, hydrosphere C, lithosphere D, uncertainty
24, which of the following plants has no differentiation of roots, stems and leaves ()
A, algae B, bryophytes C, ferns D, seed plants
25, The magnification of the eyepiece and objective lens of the four microscopes is known as follows. When observing onion epidermal cells, The microscopes with the largest number of cells in the field of vision may be ()
A, 5X, 1X B, 1X, 4X C, 15X, 1X D, 2X, 35X
26, which of the following is not biological ()
A, human B, SARS virus C, amoeba D, stone
27, spring. Transplanted saplings often have some branches and leaves cut off. The main reasons are ()
A, convenient transportation B, reducing the consumption of nutrients by trees
C, weakening transpiration D, and reducing photosynthesis
28. The following statements about plant respiration are correct ()
A, plants only breathe during the day B, plants only breathe at night
C, Plants breathe during the day and night. D. Plants breathe to absorb carbon dioxide and release oxygen.
29. How many systems does the human body have? ()
A, 9 B, 8 C, 7 D, 6
3. You can grow up from childhood if you are smart. The fundamental reasons are ()
A, cell division B, cell growth C, cell division and growth D, cell differentiation
31. The basic unit that constitutes the structure and function of an organism is ()
A. Cell colony B. Vacuole C. Cell D. Flesh
32. The following ecosystems are called "green reservoirs" ()
A. Grassland ecosystem B. Freshwater ecosystem C. Forest ecosystem D. Marine ecosystem
33. The correct way to get the microscope is ()
A. Holding the mirror arm with both hands B. Holding the mirror arm with the left hand
C. Holding the mirror arm with the right hand, Hold the mirror holder with your left hand D. Hold the mirror holder with your two hands
34. Dolly the cloned sheep looks like () < P > A. A ewe with nuclear donor B. A ewe with seedless eggs < P > C. A part of three kinds of surrogate ewes
35. The biosphere refers to ().
A. Where there are living things. B. The bottom of the atmosphere, most of the hydrosphere and the surface of the lithosphere.
C. All the living things on the earth. The living things on the earth and their living environment
36. When two kinds of paramecium are cultured together, they will compete for food, and one of them will die. The relationship between these two creatures is () < P > A. Cooperation B. Predation C. Competition D. Parasitism
37. In the following descriptions about DNA, Incorrectly ()
A. DNA mainly exists in the nucleus. B. DNA is like a spiral ladder.
C. DNA stores genetic information. D. Each DNA molecule contains a gene.
38. The correct step in the process of making onion scale leaf epidermal cells is ().
① Drop a drop of water in the center of the glass slide
② Wipe the glass slide and the cover glass clean
③ Cover the cover glass
④ Infiltrate the torn inner epidermis of onion scale leaves into the water drops on the glass slide and flatten it
⑤ Dye
a.② ① ③ ④ ③ ④ ③ ④ B.② ① ③ ③ ③ ③ C.① ④ ④ ③ ④ ② ③ ③ ③ ③ ③ ③ ③ Χ
3③. The control center of a cell is () < P > A. Cytoplasm B. Mitochondria C. Nucleus D. Chloroplast
4. After cell division, Genetic material of newborn cells ()
a. It is the same as the original cell. B. It is twice as many as the original cell.
C. It is twice as few as the original cell. D. It is almost
The question number is 123456789 11121314
The answer
The question number is 15 16 17 18 19 2 21 22 23 24 25. 26 27 28
Answer
Question No.29 3 31 32 33 34 35 36 37 38 39 4
Answer
2. Fill in the blanks (1 point for each space, ***3 points)
41. Viruses can be divided into three categories according to different hosts: viruses, viruses and bacterial viruses.
42. In the process of seed germination, the first thing that breaks through the seed coat is.
43. Seed plants are more adaptable to life on land than mosses and ferns, and one of the important reasons is that they can be produced.
44. The substance in the nucleus that can be dyed dark is called, and it is composed of protein.
45. The process of inquiry includes: asking questions, making plans, implementing plans,
and expressing and communicating.
46. After a long time, the remains of ancient pteridophytes have become.
47. The structure of broad bean seeds includes seed coat, radicle, cotyledon.
48. The creatures in nature have the same characteristics: they all need and can do everything in their lives, can excrete what is produced in their bodies, can respond to stimuli, can do everything, and be harmonious.
49. The molecules in the cell are small, generally the substance without carbon is called, while the molecules are large, generally the substance containing carbon is called. Water belongs to protein.
5. The magnification of the image seen under the microscope is the same as the magnification.
51. Write down two gymnosperms in our school at will.
52. Plants are used as indicator plants for monitoring air pollution.
53. The structure of the blade includes epidermis and.
54. Branches are developed from buds, and the inorganic salts most needed for plant growth are nitrogen, phosphorus and phosphorus.
3. Comprehensive questions (***3 points)
55. The figure below shows the outline of a certain leaf. Please answer the following questions according to the figure and the arrow: (6 points)
(1) If this figure is a schematic diagram of photosynthesis, the substances indicated by the arrow are
[1] yes and [2] yes respectively.
(2) If this figure is a schematic diagram of respiration, the substances indicated by the arrows are:
[1] oxygen, [2] respectively.
(3) The passage of substances [1] and [2] into and out of the blade is.
56. The picture on the right shows the flower structure. Please answer the questions according to the picture. (6 points)
(1) In the figure (fill in the label)
* * is isomorphic to [8] pistil, in which
[