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鍐€鏁欑増涓冪骇绾х敓鐗╁唽 synchronous exercise: linear animals and annelids (2 with answers) data download 鍐€鏁欑増 seventh grade biological book synchronous practice: linear animals and annelids (2 with answers) linear animals and annelids (15 minutes and 30 minutes) First, multiple-choice questions (2 points for each sub-question, a total of 16 points) 1. The following narrative errors about aphids are () A. Aphids are dioecious animals B. Aphids rely on the absorption of nutrients in the small intestine Material life C. Aphids are not parasites D. Aphids enter the body mainly through food from the mouth 2. Description of linear animals, which is incorrect ( ) A. Body slender B. Body surface has cuticle C. D. There are mouth and anus in human or animal body 3. Among the following morphological and structural characteristics of aphids, which one is not suitable for parasitic life ( ) A. The body is cylindrical B. The body surface has cuticle C. Reproductive organs Developed D. The structure of the digestive tract is simple. 4. After the heavy rain, you can see many cockroaches crawling on the ground. This is because () A. 铓殦 likes a lot of environment B. After the rain, there is more food on the ground C. Lack of air in the soil D. Inside the cave Dry 5. (2014路 Taian simulation) The figure is one of the most common annelids - 铓殦, the following is about the narrative error () is the front end of the 铓殦 B.1 is the 鐜?ring C. 铓殦 body by Many similar 2 compositions D. 鍛煎惛 rely on the wet body wall for breathing 6. The following are not part of the animal () 7. The following statement about cockroaches, the incorrect is () A. The discharged manure will contaminate the soil B The intestines can be peristalized. C. Rich in protein, can be used as a bait for fish. D. Loose soil and promote plant growth. 8. Among the following structural features, which is the evolutionary height of the mites (A. The body has a body section B. Camp free life C. There are mouth anus D. Reproductive organs developed two, non-choice questions (a total of 14 points) 9. (8 points) According to the observation of the experiment to complete the following problems: (1) Located at the end of the body, the color is relatively good. (2) When the squat moves forward, the body is fixed, the body changes, the body is stretched forward, and then the body is fixed, the body changes, and the back moves forward.

(3) Put the enamel on the glass plate to observe the movement, the expansion and contraction speed and speed of the cymbal, the reason is the surface of the glass plate, and the bristles play a fixed role.

10. (6 points) A group discussed and developed the following plan around the question 'What kind of objects are crawling fast?' Background: 铓殦 Living in wet, loose, organic-rich soil .

Its body is made up of many body segments, the body is moist and has many rough bristles.

铓殦 Rely on muscle and bristles.

Please complete the inquiry content of the group plan: (1) Questions raised: (2) Assumptions made:

(3) Experiment: Prepare a certain amount of enamel, a piece of thin wood and a piece of glass.

Experiment A: Let the cricket climb for 3 minutes and record the crawl distance. Experiment B: Let the cricket climb for 3 minutes on a thin wooden board and record the crawling distance.

(4) Experimental data: average creep distance (cm) glass plate 12 thin wood board 30 (5) Experimental conclusion: Through the analysis and judgment of the experimental data, the following conclusion can be drawn: the surface of the object crawling fast .

(6) What are the experimental variables of Experiment A and Control Experiment B in this experiment? . [Kehai picking up the shell] The magical use of the world medical organization: Alizarin is the world's strongest natural antithrombin substance.

Alizarin is rich in acidic peptides, which can be absorbed by the human body 100%, and has a special physiological effect, which can quickly reduce the high five (high blood viscosity, high blood fat, high blood pressure, high cholesterol, high blood sugar) and Improve the body's immunity. Answers and analysis of linear animals and annelids. Multiple choice questions (2 points for each sub-question, total 16 points) 1. The following narrative errors about aphids are ( ) A. Aphids are dioecious animals B. Aphids rely on intestines in the small intestine The nutrient life C. Aphids are not parasites D. Aphids mainly enter the human body through the food from the mouth [analysis] choose C.

This question examines knowledge about mites.

Aphid is a parasite that is dioecious. The male end is curled and slightly shorter than the female. It is parasitic in the small intestine of the human body and lives on the semi-digested chyme in the small intestine. Protective effects. 2. Regarding the description of the linear animal, which is incorrect ( ) A. The body is slender B. The surface has a stratum corneum C. Both are parasitic in the human or animal body D. There are mouth and anus [analysis] choose C. This question examines the knowledge of linear animals.

Some linear animals are free to live, such as Caenorhabditis elegans; some are parasitic in humans, livestock, poultry, and crops.

So the C item is wrong.

3. Among the following morphological and structural characteristics of aphids, which are not suitable for parasitic life ( ) A. The body is cylindrical B. The body surface has a cuticle C. The reproductive organs are developed D. The digestive tract structure is simple [Analysis] Select A. This question examines the characteristics of locusts suitable for parasitic life. Among the four options, the B body surface has a stratum corneum to prevent the erosion of the digestive juice and prevent the insect body from being digested by the digestive juice; the C reproductive organs are developed, the reproductive ability is strong, which is good for breeding offspring, and the race is continued; The structure is simple and can digest the chyme in the small intestine. So these three options are all adapted to their parasitic life. Pork mites in flat animals are flat and also parasitic, so the cylindrical shape of mites is not suitable for parasitic life.

4. After the heavy rain, you can see many cockroaches crawling on the ground. This is because () A. 铓殦 likes the environment with plenty of water. B. There is more food on the ground after the rain. C. The air is lacking in the soil. D. Inside the cave. Too dry [solving guide] can be cut from the breathing characteristics of the cockroach. There is no special respiratory organ, and the air in the soil is breathed by the body wall. [Analysis] Select C. The cockroaches breathe with a moist body wall that breathes oxygen from the soil.

After the heavy rain, the rain drains out the oxygen in the soil gap, the oxygen in the soil is reduced, and the cockroaches are unable to breathe in the soil. In order to breathe, they rush out of the ground. 5. (2014路Tai'an simulation) The figure is one of the most common annelid animals - 铓殦, the following related narrative mistakes are () the end is the front end of the cockroach B.1 is the 鐜?ring belt C. 铓殦 body by many Similar 2 composition D. 杩涜 rely on the wet body wall for breathing [analysis] select A. In the figure, 1 is the endless belt, 2 is the body section, and one end near the endless belt is the front end, so A is the front end, so A is wrong.

6. The following items that are not part of the animal are () [Solution Guide] Methods for distinguishing linear animals from annelids: Linear animal segments have no body segments, no body segments, and circular body segments. There are mucus in the horny layer, and there are bristles or squat movements. The body bends and stretches slowly. The spurs are supported by the bristles or the squats. The body has thickness and length changes during exercise. This question examines the characteristics of the animal in the link.

An annelid consists of a number of similar ring segments. In the four images, only animals in A do not have this feature. 7. In the following description of 铓殦, the incorrect is () A. The discharged feces will contaminate the soil B. The intestines can creep C. Rich in protein, can be used as fish bait D. Loose soil and promote plant growth [analysis] 銆慡elect A.

铓殦 绌?铓殦 鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦?鍦⊿oil; the intestine wall has developed muscles, the intestines can move; the protein is rich in protein and can be used as a fish bait or animal feed.

[Life Link] Fashionable Environmental Stars - Now, a new garbage biological treatment technology is beginning to flourish in developed countries such as Japan and the United States. This technology uses the ancient creature we are very familiar with - 铓殦. The sputum digestive tract is a natural organic waste treatment plant. By continuously ingesting and digesting, it can turn garbage into something beneficial to humans: it can secrete a variety of biologically active ingredients in the intestines, and some minerals will become nutrients that are easily absorbed by plants after being treated with sputum. It is suitable for water retention and fertilizer retention, and contains trace elements required by plants. It is a green bio-fertilizer.

In the ecosystem that can form a virtuous circle of waste disposal, it is a well-deserved protagonist. 8. Among the characteristics of the following structures, which is the evolutionary superiority of the mites ( ) A. The body has a body section B. Camp free life C. There is an anus D. The reproductive organs are developed [analysis] A. Aphids belong to linear animals, their bodies are cylindrical, their ends are tapered, and they are not segmented. They are part of the animal, and the body is composed of many similar ring segments. Body segmentation can enhance the flexibility of animal movement and adapt to the environment; B is not related to evolution; C and D are common features of ticks and mites.

Second, non-choice questions (14 points total) 9. (8 points) According to the experiment of observing 铓殦 complete the following problems: (1) the ring is located at the end of the body, color, texture. (2) When the squat moves forward, the body is fixed, the body changes, the body is stretched forward, and then the body is fixed, the body changes, and the back moves forward.

(3) Put the enamel on the glass plate to observe the movement, the expansion and contraction speed and speed of the cymbal, the reason is the surface of the glass plate, and the bristles play a fixed role.

[Analysis] This question examines the morphological structure and movement of 铓殦. (1) The body of the scorpion is composed of many body segments similar to each other. The front end of the body has a thick ring with a lighter color and a smooth surface. It is an annulus, and the front and rear ends of the sputum can be distinguished according to the position of the annulus. (2) The movement of the ankle depends on the contraction of the body wall muscle, relaxation and bristles. When the squat moves forward, the bristles at the back end of the body fix the rear end of the body, and the front end of the body becomes thinner and longer. After moving forward for a distance, the bristles at the front end of the body fix the front end of the body, and the back end of the body becomes thicker and shorter. Pull the back end of the body forward for a distance, so that it slowly creeps. (3) When the cymbal moves on the glass plate, the expansion and contraction is large, but the speed is slow, because the surface of the glass plate is smooth, and the bristles cannot fix and support the body. Answer: (1) front shallow smooth (2) rear end front end fine front end thick (3) large slow slow smooth can not (or can not) 10. (6 points) a group around 'what kind of object surface climb The problem of getting fast, discussed and formulated the following plan: Background knowledge: 铓殦 live in wet, loose, organic-rich soil. Its body is made up of many body segments, the body is moist and has many rough bristles.铓殦 Rely on muscle and bristle movement. Please complete the inquiry content of the group plan: (1) The questions raised: (2) Assumptions made: (3) Experiment: Prepare a certain amount of enamel, a piece of thin wood and a piece of glass.

Experiment A: Let the cricket climb for 3 minutes and record the crawl distance.

Experiment B: Let the cricket climb for 3 minutes on a thin board and record the crawl distance. (4) Experimental data: average creep distance (cm) glass plate 12 thin wood board 30 (5) Experimental conclusion: Through the analysis and judgment of the experimental data, the following conclusion can be drawn: the surface of the object is crawling fast.

(6) What are the experimental variables of Experiment A and Control Experiment B in this experiment? .

[Parsing] There is only one variable in the control experiment. This is the problem to be explored. The other quantities are the same and are appropriate.

Investigate what kind of object surface climbs fast, and the variable is the roughness of the surface of the object. The experiment should have a control group and an experimental group, and the experiment was repeated several times.

The questions, assumptions, and conclusions of the experiment should be consistent. (1) Exploring what kind of object surface climbs fast, and can raise questions accordingly.

(2) The assumption is made that 铓殦 crawls fast on the surface of a smooth (or rough) object. (3) Experiment: Prepare a certain amount of enamel, a piece of thin wood and a piece of glass. Experiment A: Let the cricket climb for 3 minutes on the glass plate and record the creep distance. Experiment B: Let the cricket climb for 3 minutes on a thin wooden board and record the crawling distance. (5) Experimental conclusion: Through the analysis and judgment of the experimental data, the following conclusions can be drawn: 铓殦 crawls fast on the surface of rough objects.

(6) The experimental variables of Experiment A and Control Experiment B are the roughness of the surface of the object.

Answer: (1) What kind of object surface climbs fast (2) 鐖?climbs fast on smooth (or rough) surface (3) glass plate (5) rough (6) rough surface of object Degree [Interactive Inquiry] (1) In this experiment, how should we measure the distance of cockroach crawling due to the bending of the 铓殦 crawling route? Hint: If you start measuring from the head position of the cockroach, you should also measure the head position of the cockroach.

A thin line can be used to spread along the crawling area and measure the length of the line.

(2) How did you ensure that you breathe normally during the experiment? Tip: Use a wet cotton ball soaked in water to wipe the body surface.

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