Seventh grade biological geography paper must be testedThe following are some of the topics that might be tested in the seventh grade biology and geography papers:
* * 1. Biological Part **
1. * * Creatures and the environment **
- The concept of an ecosystem was like the ecosystem formed by all the creatures in the Xiangjiang River and their living environment. Understand the components of an ecosystem, including producers (such as plants that can use light to produce organic matter), consumers, and decompose, as well as non-biological components (such as environmental factors such as temperature and moisture).
- The influence of biological factors on organisms, such as competition (for example, wheat and weeds in the wheat field compete for sunlight, water and other resources), predator relationship, etc.
- The influence of the environment on organisms, such as oranges mainly distributed in the south and apples mainly distributed in the north, was affected by the ecological factor of temperature.
2. * * Cell structure and function **
- To use a microscope, the material must be thin and transparent before it could be used for microscopic observation. When using a microscope, the aperture should be adjusted and a concave mirror should be used when the light is dark.
- The structures shared by plant cells and animal cells (such as mitochondria, which are the energy convertors shared by plant and animal cells), as well as the structures unique to plant cells (such as plastids, cell walls, and vesicles). The correct operation of making the temporary mounting of the onion scale leaf inner skin cells (such as dripping clear water in the center of the slide, flattening the torn inner skin, covering the cover glass with water droplets first and then slowly putting it down, adding the solution of iodination from one side and draining it with blotting paper from the other side during dyeing, etc.).
3. * * The physiological functions of plants **
- photosynthesis, exhalation, and transpirations. The trees on the campus could photosynthesize, breathe, and evaporate in early summer. The essence of photosynthesis was to synthesize organic matter and store energy. The essence of breathing was to decompose organic matter and release energy. The carbon dioxide produced by plant breathing could be verified with a black plastic bag (because black could avoid the interference of photosynthesis on the experiment).
- The conditions for the seeds to germinate were that the wheat seeds stored in the granary generally did not germinate because of the lack of water.
- The relationship between the structure of the flower and the development of the fruit. For example, in peach blossoms, the ovaries could develop into fruits, and the ovules inside the ovaries developed into seeds. The process of pollen falling on the pistil was called pollen.
4. * * Plant Groups **
- Algal plants did not have roots, stems, and leaves. They were distributed in the water environment and provided most of the oxygen in the air.
5. * * Cell division and inheritance **
- The change in the number of microorganisms in the process of cell division. The human nucleus has 46 microorganisms. After two divisions, four cells are formed. The number of microorganisms in each cell remains unchanged at 46.
- Knowledge related to cloning technology, such as cloning animals, explained that the genetic information was in the nucleus, and the traits of cloned animals were the most similar to those of the nucleus donor.
* * 2. Geography **
1. * * The movement of the earth **
- The direction of the Earth's rotation (from west to east), the cycle (one day or 24 hours), the rotation of the Earth produces the phenomenon of day and night alternating, which is why we see the sun rising in the east and setting in the west.
- The knowledge of the latitude and longitude network, how to determine the location of a point on the earth by latitude (the equator is 0 °, increasing north is north latitude, increasing south is south latitude) and longitude (the prime meridian is 0 °, increasing east is east latitude, increasing west is west latitude), such as determining the location of Beijing (40 ° N, 116 ° E).
2. * * Indian geographical knowledge **
- India's climate was dominated by tropical monsoons. Except for a small range of plateau climate, mountain climate, and tropical desert climate, most areas had high temperatures throughout the year, and the year was divided into two seasons of drought and rain. The rainy season is the southwest wind from June to September, and the dry season is the northeast wind from October to May of the following year. The instability of the southwest wind may lead to floods or droughts.
- The terrain of India was mountainous in the north (the Himalayas), plains in the middle (the Ganges Plain), and highlands in the south (the Deccan Plateau). Rivers such as the Ganges flowed into the Bay of Bengal. India was bordered by the Bay of Bengal in the east and the Arabian Sea in the west.
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