Who knows biology, I m in the first year of junior high school!!!

I'm also in the first year of junior high school, so I don't know if the landlord is interested.

I'm pretty good in biology.

As a biology graduate student, I expressed a lot of pressure

(1) The balls must be placed in a place where there is sunlight, because sunlight provides power to maintain the energy flow and material circulation of the ecosystem.

2) The energy flow in this ball is: sunlight, algae, and small fish.

3) The reason why small fish and algae can survive is that algae provide O2 and nutrients for small fish through photosynthesis, small fish provide CO2 for photosynthesis of algae through respiration, and the excrement is decomposed into simple small molecule substances by decomposers and then used by algae.

There are sunshine algae - small fish.

Small fish provide carbon dioxide and excrement as nutrients for the growth of algae, and algae provide oxygen and food for small fish.

Sunny place.

Sunlight --- algae (photosynthesis - production of oxygen, food for small fish) - small fish (digestion).

There is a relatively complete biological chain.

Sunlight in the sun, algae and small fish.

Interdependence.

The potato is its stem, and the potato that grows into it has differentiated—it has sprouted. Therefore, when planting, it is necessary to choose potato cubes with sprouts and plant them in the soil to grow into new plants. Potato pieces without sprouts generally cannot be differentiated into sprouts, so they can no longer grow sprouts when planted in the soil, and they will rot after a long time.

Question 2: I think you're right. You are very good at thinking, I support you, do you want to learn, you should be like you.

But if it's a high school creature, you don't need a bud.

If it's a college creature, you don't even need potatoes.

(1) The wall of the tube is thin, and only one layer of epithelial cells is composed;

2) oxygen, glucose, amino acids, etc.;

3) Carbon dioxide.

When breathing, the correct way for outside air to enter the lungs of the brigade is as follows: (nasal) - pharynx) - larynx) - trachea) - bronchi).

The respiratory tract is not only a gas channel, but also a warm, moist, and clean air. Among them, the laryngeal vocal cords can also ( vocalization).

The food we eat and the air we inhale have to pass through (swallowing), some people laugh while eating, and when swallowing (epiglottis cartilage) has no time to cover it, the food enters (trachea), Qin Jing will cause a violent cough.

When the lungs inspire, the changes in lung volume and air pressure are as follows: the lung volume increases and the air pressure in the lungs decreases.

Hello, is it really just a biology question for the first year of junior high school? Dizzy! It seems that the landlord's post is clearly written. Or is it something else?

Smoke from homes and factories should be gaseous and particulate pollution; At the same time, sulphur dioxide should be dissolved in water, --- smoke from homes and factories"

To prevent this problem, promote the increase of collective heating and heating; The factory has added dust removal and desulfurization equipment to reduce the pollution index of gas emission pollutants;

Through the cooperation of environmental protection and meteorological departments, the coordinated early warning mechanism of daily air pollution index and weather changes will be strengthened.

Air pollution, the pollutant is SO2, and the pollutant ** is the sulfur-containing exhaust gas emitted by the factory.

1. Desulfurization when burning fossil fuels, fixing SO2 and producing sulfuric acid and other ......

1. The answers are, in order: secondary pollution from air pollution, sulfur dioxide, and smog from homes and factories.

2. Advocate the use of natural gas, electricity and other new energy sources as much as possible to reduce the impact of smog on the atmosphere.

Answer: Solution: Rain with a pH less than is considered acid rain; Acid rain is caused by the massive use of fossil fuels such as coal, oil, and natural gas, and the sulfur oxides or nitrogen oxides produced after combustion are formed into sulfuric acid or nitric acid aerosols after complex chemical reactions in the atmosphere, or are captured and absorbed by clouds, rain, snow, and fog, and fall to the ground to become acid rain

1) Acid rain harms aquatic organisms, it acidifies the water quality of many rivers and lakes, leading to the extinction of many acid-sensitive aquatic organisms, the loss of ecological function of lakes, and finally becomes a dead lake Acid rain also kills plankton in the water and destroys aquatic ecosystems In addition, acidified water sources threaten people's health, and acid rain is extremely harmful to organisms, so it is called "death in the air".

2) Acid rain directly harms the buds and leaves of plants, and in severe cases, causes the death of patches of plants The fundamental measure to control acid rain is to reduce the emission of pollutants in coal, oil and other fuels through purification devices For example, the measures that should be taken by the factory include the use of flue gas desulfurization devices, improving the utilization rate of coal combustion, and combining and utilizing pollutants

So the answer is: 1) acid rain; Death in the air;

2) buds and leaves; Cleanse; coal, oil; and exploitation