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Seeking common problems in junior high school biology examination
1. Fill in the blanks: (The total score of this question is 25 points, each space is 1 point) 1. The organelle of enzyme synthesis in cells is _ _, and the organelle of aerobic respiration is _ _. 2. The way that kelp cells absorb iodine from water is _ _, and the energy consumed is _ _. On the population issue, implementing _ _ is a basic national policy of our country. The specific requirements for controlling population growth are _ _. 5. Figure 1 is the structural formula of two molecules, which are usually connected after losing _ _ _ _, to connect this molecule.

Key words: special requirements of organelle biology teaching: aerobic respiratory synthase cell division, autosomal spermatogonia meiosis

Text snapshot:

1. Fill in the blanks: (This question has a total of 25 points, each space is 1 minute) 1. The organelle of enzyme synthesis in cells is _, and the organelle of aerobic respiration is _. 2. The way that kelp cells absorb iodine from water is _ _ _, and the energy consumed is provided by _ _ _. On the population issue, family planning is a basic national policy of our country. The specific requirements for controlling population growth are _.

First, multiple-choice questions (25 questions in total, 50 points)

1.(2 points) In order to grasp the present situation of turtle breeding in our province, the research team visited Hanshou, Anhua, Anxiang and other places successively, visited farms and interviewed relevant breeders. This biological research method is ()

A. experimental method B. observation method C. investigation method D. measurement method answer C.

2.(2 points) Some mimosa leaflets will be folded and drooped after being shaken, which is ()

A. biological growth B. biological response to external stimuli C. biological respiration D. biological development test answer B.

3.(2 points) Organization is one of the structural levels of organisms. Which of the following tissues does not exist in humans and animals ()

A, epithelial tissue b, conductive tissue c, muscle tissue d, nerve tissue answer B.

4.(2 points) Fertilizing cultivated flowers is to provide () for plant growth.

A. water B. inorganic salt C. organic matter D. energy test answer B.

5.(2 points) Which of the following is due to the destruction of the food chain, resulting in the reduction of rice production ()

A. continuous drought B. improper use of pesticides C. killing frogs in large numbers makes pests multiply D. the harm of acid rain C.

6.(2 points) The human body is a unity composed of cells, tissues, organs and systems. The following can correctly reflect the relationship between the four concepts: ()

Test answer b

7.(2 points) In order to verify that chloroplast is the place of photosynthesis, which of the following materials should be used for the experiment ()

A. camphor leaves B. spinach leaves C. silver-edged geranium D. Pinus massoniana needles answer C.

8.(2 points) Among the following devices, () can quickly and safely remove chlorophyll from leaves.

Test answer b

9.(2 points) If there is too much rain in summer, a lot of crops will die, because ()

A. too much water can't be absorbed by root hairs. B.too much water can't make the roots breathe.

C. too much water makes bacteria multiply. D. crops absorb too much water and swell to death. Answer B.

10.(2 points) The following statement is true ()

A. The nutrition for fetal development ultimately comes from the placenta.

B. the initial development of an embryo begins with the division of a fertilized egg.

C. "Pregnancy in October" means that it usually takes ten months from the beginning of pregnancy to delivery, totaling about 300 days.

D. after the embryo is delivered from the mother, it is called the answer to the fetal test question B.

1 1.(2 points) The carbon dioxide gas exhaled by human body is more than the carbon dioxide gas inhaled, and the excess part finally comes from ().

A. tissue cells B. capillaries C. alveoli D. vein test answer A.

12.(2 points) The researchers found that the urine of a mouse with a gland removed in the body can attract a large number of ants, so this gland is most likely ().

A. pancreas B. pituitary C. gastric gland D. adrenal gland answer a.

13.(2 points) When the fish stops swimming in the water, the mouth and gill cover keep alternately opening and closing, so that the water flows in from the mouth and out from the gill hole. Its physiological significance is ()

A, change the body water b, complete the breathing process.

C, excreting body waste D, ingesting food in water Answer B

14.(2 points) From the perspective of animal behavior types, the following are the same as cobwebs (

A, triumphant b, parrot-like c, frightened bird d, old horse knows the way to answer a.

15.(2 points) Observe the following figure, which shows the classification of some animals in Carnivora. Please analyze the following statement is correct ().

Tigers and leopards have more in common than tigers and cats. B, cats and leopards are closer than dogs.

C, cats and leopards look most like d, and the purpose is to classify the most basic unit answer B.

16.(2 points) The statement about sex pheromones is wrong ().

A. Secretory pheromone is an important way of information exchange between animals. B. Sex pheromones produced by females and males are different.

C. Using synthetic sex pheromones can trap pests D. Sex pheromones produced by different kinds of organisms are different answers to question B.

17.(2 points) In the picture on the right, 123④ represents four different creatures respectively, and the following statement is wrong ().

A ① bacteria, ② yeast, ③ Chlamydomonas, ④ virus.

B.③ Camp autotrophic life, 12④ Camp heterotrophic life.

C There are 123 cells with cell walls and 123 cells with formed nuclei.

D those with capsules are ① and those with chloroplasts are ③. Answer C.

18.(2 points) In summer, the dishes at home are often wrapped in plastic wrap and then put in the refrigerator. The main purpose of this is ().

A, inhibit bacterial reproduction b, prevent nutrient loss c, prevent water evaporation d, and maintain the shape and color of dishes.

19.(2 points) When Qingzhou peach branch with aa gene is used as scion and grafted on Qingzhou peach rootstock with aa genome, the probability that the genome of peach pulp cells becomes Aa is ().

A, 0% B, 50% C, 75% D, 100% answer a.

20.(2 points) In male nerve cells, the number of chromosomes and sex chromosomes is ()

A.23 Yes, YB.23, X C.46, XY D.46, XX question answer C.

2 1.(2 points) Which of the following examples can illustrate that organisms have an impact on the environment ()

A. Camels living in hot and water-deficient deserts have little urine.

B. Alhagi living in the desert, the underground roots are much longer than the aboveground parts.

C for seals living in cold seas, the thickness of subcutaneous fat in the chest can reach 60mm.

D. Planting plants in the sand can prevent wind and fix sand.

22.(2 points)/kloc-In the 0/8th century, nettles with oblique leaves in Manchester, England lived on light-colored trunks covered with lichens. Most oblique nettles are light-colored, and a few are dark. 100 years later, industrial pollution smoked bark into dark brown, deep birch became a common type, but light color became a minority. The following analysis about the phenomenon of inchworm's body color changing from shallow to deep is incorrect ()

The depth of body color of inchworm is heritable.

B. The dark brown trunk is the environmental condition for the color change of this species.

C. Insect-eating birds play a selective role in the color change of Ectropis obliqua population.

D. after the environmental conditions change, the inchworm actively changes its body color to adapt to the new environmental test answer D.