The seventh grade first volume biology midterm examination paper.
1. You will choose (2 points for each space, ***50 points). Only one of the following questions meets the meaning of the question.
1, "In April, the beauty of the world is exhausted, and the peach blossoms in the mountain temple". The environmental factors that cause this difference are
A, light b, water c, temperature d, humidity
Fish must live in water, and they will die after leaving water for a while. The most appropriate explanation for this is that
A, biological impact on the environment B, biological adaptation to the environment C, biological changes to the environment D, biological dependence on the environment
In the process of growing flowers, we often water them, fertilize them, loosen the soil and put them in the sun. The weather is cold, so we have to put them in the house. Generally, only one plant is planted in a flowerpot, which reflects the basic conditions needed for biological survival. Corresponding to the above order,
Nutrients, air, sunshine, suitable temperature, certain living space and water.
a、①③②⑤⑥④B、⑥①②③④⑤C、④⑤③⑥①②D、③⑥④⑤②①
4. The following food chain is correct.
A, grasshopper insect-eating bird snake eagle B, grasshopper herbivorous bird eagle fox C, fox eagle insect-eating bird grasshopper D, grasshopper insect-eating bird eagle snake
5, the following does not belong to biological is
A, mushroom b, coral c, coral d, kelp
6, except which of the following, are made up of cells.
A, cotton B, rice C, corn D, virus
7, the environmental factors that affect biological life are
A, temperature and air b, biological factors and water c, biological factors and abiotic factors d, light and water.
8, the following does not belong to the ecosystem is
A, a meadow B, a biosphere C, all the fish in a river D, a farmland
9. Dolly the cloned sheep looks like.
A, ewe B with seedless eggs, surrogate ewe C, and some ewes D, A, B and C with nuclear donors.
10, all kinds of animals and plants in the following environment are
A, Desert B, Tropical Rainforest C, Farmland D, River
1 1, known as the father of hybrid rice is
A, Sima Qian B, Darwin C, Yuan Longping D, Li Shizhen
12, in the ecosystem, the one-way transmission of solar energy fixed by green plants along the food chain is called
A, energy output b, energy flow c, energy exchange d, energy input
13, the body color of grasshoppers living in green grass is often
A, green b, yellow c, brown d, gray
14. Someone has done this experiment: two kinds of paramecium can grow normally when they are cultured separately, but when they are cultured together, after 16 days, one of them grows normally and the other one dies. This phenomenon explains what is the relationship between the two paramecium species.
A, predation B, competition C, cooperation D, parasitism
15, point out which of the following belongs to biology.
A, kicking robot B, growing stalactite C, beautiful coral D, green moss in the pool.
16, the cell structure of animal and plant cells is
A, cell wall b, cell membrane c, vacuole d, chloroplast
17. Watermelon is sweet and delicious mainly because it contains a lot of sugar.
A, cell membrane B, cell fluid C, cell nucleus D, cell wall
18, when you find that the microscope lens is not clean, the correct way to remove dirt is
A. Wipe B by hand, C by napkin and D by mirror paper and gauze.
19, chromosome exists in
A, cell membrane B, nucleus C, vacuole D, cytoplasm
20, the following structure does not belong to the organization is
A, onion epidermis B, corn seed C, cucumber leaf epidermis D and tomato pulp
2 1, the energy converter in animals is
A, chromosome b, mitochondria c, chloroplast d, vacuole
22. The multiples of the eyepiece and objective lens of four microscopes are known as follows. When observing onion epidermal cells, the microscope with the least number of cells in the field of view may be
a、20X、35XB、 10X、40XC、5X、 10XD、5X、5X
23, an organism cell contains 12 pairs of chromosomes, in the daughter cells formed after cell division, the number of chromosomes is
A, 12 pairs b, 6 pairs c, 24 pairs d and 4 pairs.
24. To move the object image at the upper right of the microscope field of view to the center of the field of view, which direction should the loading or slicing move?
A, lower right corner b, lower left corner c, upper right corner d, lower left corner
25. What causes AIDS?
A, fungi b, mold c, virus d, bacteria
Second, it can be analyzed (* *18)
1, carefully identify the operation shown below, point out the cause of the error, and tell the correct operation method. (8 points)
Error reason:
The correct operation method:
Error reason:
The correct operation method:
2. Li Jie made and observed the epidermal cells of onion in this way: take a clean glass slide, drop a drop of 0.7% normal saline in its center, tear off a small piece of epidermis from the inside of onion scales by hand, lay it flat in normal saline, and then observe it under a microscope. Q:
(1) Is there something wrong with his operation? Please correct me: (6 points)
In order to see the structure of cells clearly, cells can be stained. (2 points)
⑶ Under high magnification, Li Jie found that some structures in the nucleus were dyed dark by alkaline dyes. The names of these structures are. (2 points)
Third, you can connect (7 points). Please connect the related contents in the left and right columns with line segments.
1, a, animal feeding a stresses 2, a, tigers eat wild boar a cooperative relationship
B. Sunflowers grow towards the sun. Many bees are making honey.
C, flowering and fruiting of plants C, nutrition C, predation relationship between rice and weeds in the field C.
D, mushrooms breed from small to large.
Fourth, you can do it (2 points for each blank, *** 10)
Prepare soybean milk, cooked egg yolk, small plastic bag, thread and other items in advance, then pour soybean milk into the plastic bag, add cooked egg yolk, and tie the bag mouth tightly with thread, so that a cell membrane type is ready.
(1) In your model, plastic bags are equivalent to, egg yolk is equivalent to, soybean milk is equivalent to, and this model is equivalent to (animal or plant) cells.
⑵ Are cells planar or three-dimensional? .
V. You will explore (15)
Li Xiang planted a pot of leek at home and put it on the balcony, but the leek his mother bought from the market turned yellow. Li thought that the green and yellow color of leek may be related to the light during the growing period. Please design an exploration plan with him.
Attached answer:
First of all, you will choose
1、C 2、D 3、B 4、A 5、B 6、D 7、C 8、C 9、C 10、B 16、C 12、B 13、A 14、B 15、D 16、B 17、B 18
Second, you will analyze
1, the right eye should look at the eyepiece with the left eye. When the right eye is open, hold the cover glass in your hand, pick it up with tweezers, so that one side of it touches the water drops on the glass slide first, and then slowly put it down.
2.( 1)① Dropping water ② Tearing off the inner epidermis with tweezers ③ Picking up the cover glass with tweezers, while touching the water drops on the glass slide first, slowly putting it down and covering it on the material to be observed (2) Dilute iodine solution (3) Chromosome.
Third, you can connect.
1、A —c B—a C—d D—b
2. A-B-A-B
Fourth, you can let
Cell membrane cytoplasm nucleus animal cell stereo
Five, according to the general process of scientific inquiry gradually score.