The pathway by which atmospheric carbon dioxide enters living beings

Under the action of sunlight, chloroplasts convert carbon dioxide and water absorbed by roots into glucose through stomata and release oxygen at the same time: 12H2O + 6CO2 + Light C6H12O6 (glucose) + 6O2 + 6H2O Photosynthesis can be divided into two steps: light reaction and dark reaction: light reaction.

Location: chloroplast membrane.

Influencing factors: light intensity, water supply Significance: 1:

Photolysis of water to produce oxygen. 2: Convert light energy into chemical energy to produce ATP, which provides energy for dark reactions.

3: Using hydrogen ions, the product of water photolysis, Nadph+H ions are synthesized to provide a reducing agent for dark reactions. Dark reaction.

The essence is a series of enzymatic reactions.

Location: Chloroplast matrix.

Influencing factors: temperature, carbon dioxide concentration.

Process: Different plants have different processes of dark reactions, and the anatomy of the leaves is also different. This is the result of the plant's adaptation to the environment.

Dark reactions can be divided into three types: C3, C4 and CAM. The three types are divided according to the process of carbon dioxide fixation.

Through the photosynthesis of green plants and the chemosynthesis of some bacteria, it is assimilated into organic matter and enters the organism.

It is first absorbed by the plant through photosynthesis, then the plant is eaten by the animal, and the animal eats the animal, and so on.

12H2O + 6CO2 + Light C6H12O6 (glucose) +6O2 + 6H2O

The immobilization of CO2 is achieved in the dark reaction phase of photosynthesis.

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The basic process of the carbon cycle in nature is as follows:

Carbon dioxide in the atmosphere is absorbed by plants on land and in the ocean.

through biological or geological processes as well as human activities.

It is returned to the atmosphere in the form of carbon dioxide.

Green plants get carbon dioxide from the air.

It is converted into glucose by photosynthetic eggplant.

It is then synthesized into a carbonization and decons compound of the plant body.

It is passed through the food chain and becomes a carbon compound in the animal body.

The respiration of plants and animals converts some of the carbon ingested into the body into carbon dioxide and releases it into the atmosphere.

The other part constitutes the organism of the organism or is stored in the organism. After the death of animals and plants, the carbon in the remains becomes carbon dioxide through the decomposition of microorganisms and eventually emits into the atmosphere.

It takes about 20 years for atmospheric carbon dioxide to circulate in this way.

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Answers]: a, b, c, d

Carbon dioxide, commonly known as "carbonic acid", with the chemical formula CO2, is a colorless, odorless, and sour gas. The ** of carbon dioxide in the atmosphere includes: human and animal breathing, which contains about 4% of human exhaled breath; the combustion of fuels (coal, oil, etc.) in the production of raw dust; the escape of soils, mines, and active volcanoes; Rapid fermentation, decomposition and decay of organic matter.

Most of the carbon dioxide in the atmosphere is absorbed and utilized by green dust plants during photosynthesis.

The power of carbon dioxide into the biome can be said to be through photosynthesis. Plants in biomes synthesize organic matter (e.g., glucose) by fixing carbon dioxide, water, and light energy through photosynthesis, while releasing oxygen and water vapor. These organisms are ingested by consumers (e.g. animals) and oxidized to carbon dioxide and water through respiration, releasing energy.

Carbon dioxide and water will be re-sold as photosynthetic goods for plants, further fixing carbon dioxide.

In summary, life in the biome forms a circulation of matter and energy through luminal wax photosynthesis and subsequent respiration. This cycle is known as the ecological carbon cycle. Among them, carbon dioxide, as an important element in the pathway, continues to enter the biological system from the atmosphere in the ecological carbon cycle, and then continues to be released into the atmosphere from the biological system, forming a drift and flow balance.

Hello, biome refers to a bridge ecosystem composed of various biological individuals in a certain area. Carbon dioxide is one of the important raw materials for photosynthesis, so the entry of carbon dioxide is one of the important driving forces to support the survival and development of biosensitive limb community. The main ways in which carbon dioxide enters biomes include the following forms:

1.Atmospheric carbon dioxide - Carbon dioxide is constantly exchanged between the atmosphere and the biome, and the proportion of carbon dioxide entering the biome varies as the rate of gas exchange changes.

2.Carbon dioxide in water - Water is an important environmental factor in the biome, and the amount of carbon dioxide in the water can also affect the ecosystem of the biome. Carbon dioxide in water enters biomes through osmosis, diffusion, and indirect biological interactions.

3.Soil carbon dioxide - Soil is also one of the important factors in the ecosystem of the biome, and the amount of carbon dioxide in the soil can enter the ecosystem through plant root respiration and microbial decomposition.

Four. Anthropogenic disturbances- Human activities and industrial processes also have an important impact on changes in atmospheric carbon dioxide and carbon dioxide levels in water.

The driving force for carbon dioxide to enter the biome can be a variety of sensitins, including:

1.Photosynthesis: Plants absorb carbon dioxide through photosynthesis and convert it into organic matter while releasing oxygen.

2.Atmospheric Diffusion and Pants: Carbon dioxide is dispersed through the atmosphere to different places, including biomes.

3.Respiration: Organisms in a biome breathe oxygen into their bodies while releasing carbon dioxide.

4.Changes in water table: Changes in water levels may affect the ability of plants in a biome to absorb carbon dioxide.

In conclusion, the dynamics of carbon dioxide entering biological communities are the result of complex ecosystems and inter-organism interactions, which are influenced not only by environmental factors, but also by the characteristics and behaviors of organisms themselves.

There are several ways to release CO2 into the biosphere:1Human Respiratory Emissions:

Humans emit small amounts of carbon dioxide every time they breathe, so densely populated places, such as cities, produce large amounts of carbon dioxide. 2.Vehicle Emissions:

Combustion and chemical reactions in the production process produce large amounts of carbon dioxide, as well as the extraction, transportation and use of energy sources such as oil, natural gas and coal. 4.Biomass combustion:

Forest fires, crop burning, wood burning, etc., also produce large amounts of carbon dioxide. 5.Consumer Behavior:

Carbon dioxide is emitted from the energy required for shipping, packaging, and manufacturing when purchasing items. All of these pathways lead to carbon dioxide emissions, which are one of the main greenhouse gases, and have a negative impact on global climate change.

Carbon dioxide not only provides organic matter and raw materials for all living things in the biosphere. It also provides the carbon dioxide needed for respiration. Because green limb plants use light energy to synthesize organic matter that stores energy from carbon dioxide and water through chloroplasts, and the process of releasing oxygen is called photosynthesis The raw materials are carbon dioxide and water, and the products are organic matter and oxygen, the conditions are light, and the place is chloroplasts

The formula of photosynthesis in plants: carbon dioxide + water light energy chloroplast organic matter + oxygen, the organic matter produced by photosynthesis not only meets its own needs, but also provides food for other organisms, while absorbing carbon dioxide and releasing oxygen to maintain the carbon-oxygen balance in the biosphere

The formula of respiration: organic matter + oxygen carbon dioxide + water + energy, which releases a large amount of energy to provide power for the activities of living organisms (1) The formula of photosynthesis in plants: dioxygen such as carbon macrosis + water light energy chloroplast organic matter + oxygen, the formula of respiration:

Organic matter + oxygen carbon dioxide + water + energy, so a represents the plant photosynthesis residue, b represents the respiration of plants Green plants carry out photosynthesis to produce organic matter, which can not only meet their own needs but also provide food for other organisms, consume carbon dioxide to release oxygen, maintain the carbon-oxygen balance in the biosphere, and provide raw materials for respiration

Pathways of CO2 production:

1) Carbon dioxide gas can be released from all organic matter (including animals and plants) in the process of decomposition, fermentation, decay and deterioration.

2) Carbon dioxide gas is also released during the combustion of oil, paraffin, coal and natural gas.

3) Petroleum and coal also release carbon dioxide gas in the production of chemical products.

4) All manure and humic acid can also release carbon dioxide gas during fermentation and maturation.

5) All animals inhale oxygen and exhale carbon dioxide gas during respiration.

a. Respiration refers to the process in which the organic matter in the cell is decomposed into carbon dioxide and water with the participation of oxygen, and the energy is released at the same time, which is the process of carbon entering the inorganic environment from the organism.

b. Photosynthesis refers to the process in which green plants convert carbon dioxide and water into organic matter that stores energy through chloroplasts and use light energy, and release oxygen It is the process of carbon entering the body from the inorganic environment, b correct;

c. Bacteria and fungi and other organisms in the ecosystem decompose the remains and effluents of animals and plants into carbon dioxide and water, which are discharged into the atmosphere.

d. Transpiration refers to the process of water being emitted from the plant in the form of a gas to the outside of the body, which has nothing to do with the circulation of carbon

Therefore, b