Seventh grade [whole grade] biogeography examination questions multiple choice questions.

1, the following belongs to the biological is ()

A. dinosaur skeleton coral coral stalactites

2, "good rain knows the season, when spring happens. What factors are mainly described in the poem "Sneaking into the night with the wind, moistening things silently"

Biological life? ( )

A, season b, water c, biology d, human beings

It will be cooler in the shade when the weather is hot. This shows: ()

A. the environment affects the survival of living things. Biology can adapt to the environment.

C. bioenergy affects the environment D. Biological factors and abiotic factors are inseparable.

At the turn of autumn and winter, people are prone to influenza. What causes people to get sick is influenza virus, which belongs to () in the ecosystem.

A. producer B. consumer C. decomposer D. none of the above

5, the following options, can be regarded as an ecosystem is ()

A. Fish in the sea B. Pine trees in the forest C. Air in the forest D. Miyun Reservoir

6, in the experimental design, the following options can't be used as a set of control is ()

A, 25℃ and 0℃ B, presence of light c, presence of air d, temperature and humidity.

7. Farmers need to cover cotton seeds with plastic film in early spring, mainly for ()

A. increase soil temperature B. increase light intensity C. supplement air D. all of the above.

8, constitute the basic unit of human structure and function is ()

A. cell b, tissue c, organ d system

9. When observing onion skin with microscope, observe the same part of onion skin with 10× eyepiece and 10× objective lens and 10× eyepiece and 45× objective lens successively, and compare the results twice.

A. It's all inverted images, the field of vision changes from bright to dark, and the number of cells changes from less to more.

B: It's all inverted images, the field of vision changes from bright to dark, and the number of cells changes from small to small.

C. they are all positive images, the field of vision changes from dark to bright, and the cell image changes from big to small.

D. they are all positive images, the field of vision changes from bright to dark, and the cell image changes from small to large.

10, in the future, if you travel to the moon with astronauts in a spaceship, you will have left the biosphere by then, but you must bring enough substances necessary to maintain your life activities from the biosphere, which should at least include ().

A. oxygen bags, mineral water, various foods B. solar cells, thermal underwear.

C. Pet cats, computers, CDs, mosquito repellent, potted flowers and cameras

1 1. Now scientists have successfully cultivated cardiomyocytes from stem cells, and the reason for this change may be the result of ().

A. Cell division, B cell growth, C cell maturation and D cell differentiation

12, when planting flowers or crops, it is necessary to loosen the soil frequently, mainly because ()

A. promoting root system to absorb water B. preventing water evaporation

C. beneficial to root respiration D. slow down transpiration

13, there is a food chain of "algae → shrimp → small fish → big fish" in the water. If the water is polluted by DDT, the DDT content in the following organisms is the most ().

A. algae B. shrimp C. small fish D. big fish

14, the following statement about cell division is wrong ().

A. The cytoplasm divides first, from one to two. B. the nucleus divides first and divides into two.

C. when the nucleus divides, the chromosome changes are the most obvious. D the chromosome morphology and number of the new cells are the same as those of the original cells.

15. In the biosphere, the energy converters in maize plants and human bodies are () respectively.

A, chloroplasts and mitochondria b, chloroplast mitochondria

C, mitochondrial mitochondrial d, mitochondrial chloroplast

16. In the proverbs describing peanuts, "hemp house", "red curtain" and "white fat man" refer to () in turn.

A. pericarp, seed coat and endosperm B. pericarp, seed coat and embryo

C. Ovary, seed and embryo D. Fruit, seed and ovule

17, "The West Lake is spring, and the spring water is green." What kind of plants does "green" here mainly refer to ()

A. algae, bryophytes, ferns, seed plants

18, some students classified rice, watermelon and pine as one class, and kelp, liverworts and ferns as one class. The basis of his classification is ()

A, with or without roots B, with or without seeds

C, aquatic or terrestrial D, with or without fruit

19. Which of the following structures is developed from peanut seeds ()

A. fertilized egg B. egg cell C. ovary D. ovule

20. The annual () in China is Arbor Day.

A.65438+1 0 month 1 day b month 12 day c month 1 day d. 65438+ 10 month/day.

2 1. Can you distinguish between facts and opinions? The following statements are not opinions.

A. "Lucy" girls may adopt the exercise method of walking upright.

B. "East Africans" have the ability to make and use tools.

Many early human fossils have been found in the Great Rift Valley in East Africa.

D. Homo erectus in Asia migrated from Africa.

22. The development of human embryos begins with fertilized eggs, and the place from the formation of fertilized eggs to the birth of babies is

① Ovary ② Testicle ③ Tubal ④ Uterus ⑤ vas deferens ⑤ vagina.

A.①④⑥ B.①③④⑥ C.①⑤④⑥ D.③④⑥

23. Adolescence is a very important period of human development. The following statements about the characteristics of adolescence are correct.

A. the body is fully developed. Weight gain is not obvious.

C. Sexual organs develop rapidly under the action of gonadotropins. D. Height growth is slow.

24. In order to compare the content of vitamin C in vegetables, according to the principle that vitamin C can make potassium permanganate solution fade, Liu Hui designed the following experiment: add 2 ml of potassium permanganate solution with the same mass fraction into four identical test tubes, and then drop several vegetable juices into them with a dropper. The observation results are as follows: judge which vegetable contains the most vitamin C.

Vegetable juice type

Fresh cucumber juice

Green pepper juice

celery juice

chinese cabbage juice

Drop amount of vegetable juice

14 drops

8 drops

15 drops

1 1 drop

A. cucumber b green pepper c celery d Chinese cabbage

People who eat polished rice for a long time may suffer from beriberi because of their poor health.

A. Vitamin A B. Vitamin B1C. Vitamin C D. Vitamin D.

26. In an operation, the doctor took some liquid contents from the patient's digestive tract and found that it contained a lot of amino acids, glycerol, fatty acids, water, glucose and other substances. Do you think these contents are most likely to come from

A. Esophagus B. Stomach C. Small intestine D. Large intestine

27. There are many traditional foods among China people, such as Laba porridge, fish porridge and vegetarian jiaozi. From a nutritional point of view, these foods have the following characteristics.

A. Excellent cooking. B. Single nutrition

C. Beautiful color, smell and taste D. More comprehensive nutrition.

28. The air outside is cold and dry, mixed with dust and bacteria. After passing through the nasal cavity, it becomes warm, moist and clean. The corresponding structure in the nasal cavity is

① Nose hair ② Nasal mucosa ③ Olfactory cells in nasal mucosa ④ Capillaries in nasal mucosa.

A.①②③ B.①②④ C.②③④ D.①③④

29. As the saying goes, "Eat without talking, sleep without talking." In fact, scientifically speaking, you can't talk and laugh loudly when eating. as a result of

A. the blood flow through the digestive organs is reduced, which is not conducive to digestion. B. food is easy to enter the trachea by mistake from the pharynx.

C. the amount of saliva secreted by salivary glands is reduced. D. it is beneficial to protect vocal cords.

30. When swimming, people often have this experience. If the water exceeds the chest, they will find it a bit difficult to breathe. this is because

A.i can't swim. I'm nervous.

B. The volume of the chest cavity is reduced, the air pressure in the lungs is reduced, and the outside air is not easy to enter.

C. The volume of the chest cavity decreases, and the air pressure in the lungs increases, making it difficult for outside air to enter.

D. The volume of the chest cavity increases, the air pressure in the lungs increases, and the outside air is not easy to enter.

3 1. The picture on the right shows two states when breathing peacefully. According to figure 1, the description is as follows.

① Contraction of external intercostal muscle and diaphragm ② Relaxation of external intercostal muscle and diaphragm.

③ Ribs move up ④ Ribs move down.

⑤ Diaphragmatic crest decreases ⑤ Diaphragmatic crest increases ⑤ Intrapulmonary pressure is greater than atmospheric pressure.

⑧ The intrapulmonary pressure is lower than atmospheric pressure.

A.①③⑤⑧ B.②④⑥⑦

C.①④⑤⑦ D.②③⑥⑧

32. Exhaled gas contains more carbon dioxide than inhaled gas. Where did these carbon dioxide finally come from?

A. alveoli B. red blood cells

C. capillaries around tissue cells

33. Li Fang has the flu, accompanied by fever, cough and other symptoms. The doctor advised her to have a blood test. Please guess that the number of blood cells on her blood test list may increase significantly.

A. Red blood cells B. White blood cells C. Platelets D. Hemoglobin

34. When taking blood or blood transfusion, the upper part of the acupuncture site (near the heart) should be tied tightly with a rubber tube. The following explanation is not appropriate.

The purpose is to slow down or temporarily stop the centripetal movement of blood.

B) Because of excessive blood, blood vessels swell, thus facilitating acupuncture.

C Most veins have shallow distribution, thin wall and strong elasticity, which is beneficial to acupuncture.

D. Blood in the artery flows to the heart, and there is little bleeding in the wound after puncture, so it can stop bleeding with a little compression.

35. The picture on the right is a schematic diagram of blood flowing through organs. The following statement is correct.

A.b stands for heart, then venous blood flows into C.

B.b stands for lung, then venous blood flows into C.

C.b means small intestine, and then arterial blood flows in C blood vessels.

D.b stands for glomerulus, and then arterial blood flows in blood vessel C.

36. Doctors often choose different blood cell components or plasma components to input into patients according to their condition. What blood components should be imported for patients with severe anemia?

A. plasma protein B. red blood cells C. white blood cells D. platelets

37. The basic unit of renal urine formation is

A. renal tubule B. nephron C. renal capsule D. glomerulus

38. Xiaoming's mother's daily urine output is several times that of normal people, and she is often thirsty to drink water. Then Xiao Ming's mother's kidney function is likely to be damaged.

A. glomerulus B. renal tubule C. renal capsule D. renal capsule cavity

39. After blood passes through which of the following organs, waste in plasma will be reduced.

A. Lung and kidney B. Kidney and liver C. Small intestine and stomach D. Lung and liver

40. In the process of urine formation, substances that can be filtered and completely reabsorbed are

A. inorganic salt B. water C. urea D. glucose

4 1. The principle of producing biogas and high-temperature compost from human excrement, livestock urine and crop straw is as follows.

A. photosynthesis, respiration, diffusion, transpiration

42. Xiaogang's grandparents are almost 60 years old. Grandpa usually wears glasses and takes them off when reading. Grandma, on the other hand, doesn't wear glasses at ordinary times, but wears glasses when reading. The lens of Xiaogang's grandparents' glasses is the most likely.

A. color changing mirror and concave lens B. concave lens and color changing mirror C. concave lens and convex lens D. convex lens and concave lens

43. Auditory receptors are located in

A. Cochlea B. Tympanic membrane C. Semicircular canal D. Vestibule

44. The central nervous system consists of the following

A. Brain and spinal cord B. Brain and cranial nerves

C. Brain and spinal cord D. Brain, spinal cord and its nerves

45. Among the following reactions, reactions that are different from other reaction types are

A. Circus gorillas and other animals can play basketball. B.the dog runs when it sees a man holding a stick.

C. The kangaroo will climb into its mother's pouch after birth. D. the rabbit will come out for food when he hears the breeder's footsteps.

46. The following statement about neuromodulation is wrong.

A. "Looking at plums to quench thirst" belongs to complex reflex, while sucking reflex of infants belongs to simple reflex.

B the spinal cord can transmit the "instructions" issued by the brain to the organs it controls.

C. Puppies can calculate simple numbers, which is a simple reflection.

D. People are drunk and walk unsteadily, which means that alcohol has anesthetized the cerebellum.

47. The following hormones will affect the brain development of infants.

A. Thyroid hormone B. Sex hormone C. Insulin D. Growth hormone

48. In order to prove a point, scientists have done the following experiments: ① Destroy the thyroid gland of tadpoles and find that tadpoles stop developing and cannot develop into frogs; ② Put thyroid hormone into the water in the feeding trough, and tadpoles that destroy the thyroid will develop into adult frogs. These two experiments can prove that

A. Thyroid gland can secrete thyroid hormone B. Thyroid hormone can promote the development of young animals.

C. Growth hormone can promote the growth of tadpoles.

49. At present, the increasingly serious environmental problems in the world mainly stem from

A. Greenhouse effect B. Biological invasion

C. Volcanic eruptions and earthquakes D. Human pollution and destruction of the environment

50. The "Minamata disease" and "pain" in Japan are caused by which of the following substances is contained in industrial wastewater?

A. Mercury and silver B. Mercury and lead C. Mercury and cadmium D. Silver and cadmium

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