How to sense the presence of bacteria and fungi?

First, whether there is a change in the smell, for example, if you smell musty, it means that there is a fungus.

Clause. 2. Look at the appearance: If you find that there are "white hairs" on the food, it is because there are fungi moving and multiplying.

Clause. 3. Look at the state: the apple that was originally intact later had rotten wounds and was still dripping, indicating that there was bacterial activity, and bacteria were different from fungi and could not be seen directly, but the phenomenon of apple corruption was easy to perceive.

In fact, the mold in the fungus is also very small, and we can't see the individual mold. But when the fruit is moldy, we can see that there are a lot of "hairs" growing on it. That's because there are countless molds that grow together to form a visible ensemble.

Use your brain: Isn't it convenient to use artificially cultured colonies to observe bacteria and fungi, and think about how this is made? Have you thought of it?

There are two principles that must be adhered to when designing experiments: a. Comparative Principle II.

The Single Variable Principle III. Characteristics of the distribution of bacteria and fungi: in the biosphere.

Think about it: Bacteria and fungi are so widely distributed, what conditions do they need to survive? Mushrooms are a type of fungus and did you know that it likes to live in**?

What can you infer from this? Short Answer Questions 1, The general method of bacterial and fungal culture is: Love the people around you and make them happy The general method of bacterial and fungal culture is:

2. Which step in the general culture method of bacteria and fungi is equivalent to the third tip? Inoculation steps. 3. What do you think is the distribution of bacteria and fungi?

Bacteria and fungi are almost ubiquitous, but they are distributed differently in different environments, such as mobile phones and 100-dollar bills. 4. Under what environmental conditions are bacteria and fungi impossible? In this **, is there such a situation?

Why? It is impossible for bacteria and fungi to be present in an environment that has undergone strict autoclaving. Yes, because the Petri dishes of the control group remained sealed after being autoclaved.

In the hot summer, things are easy to spoil and get gastroenteritis.

There are also more people, why is that? Washed clean clothes will not grow mold, but dirty clothes are prone to mold, why is that? 5. What are the basic conditions for the life of bacteria and fungi?

Basic Conditions for Survival 1Moisture 2Suitable temperature 3

Organic matter 4Some also require special conditions (e.g. some bacteria must survive in the absence of oxygen) What are the basic conditions for bacteria and fungi to live? Living conditions of bacteria and fungi:

Moisture, suitable temperature, organic matter and a certain living space are necessary conditions for the life of bacteria and fungi.

Some bacteria and fungi also need oxygen, while others are inhibited by aerobic conditions.

Sensing bacteria? Let's do experiments and look under the microscope.

Some fungi can be seen with the naked eye, and some are parasitic in the intestinal flora, and the impact of changes in the flora can be roughly judged through their own gastrointestinal conditions.

How to identify bacterial diseases? Burn sick leaves with a lighter! Bacterial diseases are characterized by smelling! The rotten fungus smells thick and smelly! The odor emitted by burning diseased leaves with a lighter is a unique characteristic of bacterial diseases.

Categories: Healthcare.

Problem description: We are going to have a debate.

Do you think that fungi and bacteria do more good than bad in life or do the good outweigh the harm?

Say a brief reason, thank you.

Analysis: There are no pros and cons.

Some bacteria can cause inflammation, but some can also produce essential substances for the body. And bacteria can also inhibit the growth of fungi.

Some fungi, such as mushrooms and fungus, are edible and some are poisonous. In addition, some fungi can also inhibit the growth of bacteria. Elephant penicillin is extracted from fungi. Of course, fungi can also cause serious infections.

Specifically, it should be the pros and cons of a particular type of bacteria or fungus.

Bacteria and fungi both have the word "fungus" in their names, and they both belong to microorganisms, but they have many differences in the type, structure, size, proliferation mode and name of the organism.

Fungi: are organisms with eukaryotic and cell walls; Fungi, like bacteria and microorganisms, are decomposers, i.e., organisms that break down the organic matter of dead organisms. Fungi decompose organisms into various inorganic substances, which increases the fertility of the land.

There are also fungi that are used in food processing, such as yeast in bread and other processing, and fungi are also needed for winemaking. In agriculture, forestry and animal husbandry, fungi have a harmful side. Fungi can cause a variety of plant diseases, which can cause huge economic losses.

Bacteria: It is a kind of unicellular organism belonging to prokaryotic cells, with a small body and simple structure, no forming nucleus, no nucleolus and nuclear membrane, and no other organelles except nucleoproteins; Bacteria are widely distributed in soil and water, or live in symbiosis with other organisms. The human body also carries quite a lot of bacteria.

It is estimated that the total number of bacterial cells in the human body and epidermis is about 10 times the total number of human cells.

The nutritional mode of bacteria is self-managed and heterogeneous, among which heterogeneous saprophytic bacteria are important decomposers in the ecosystem, so that the carbon cycle can be carried out smoothly. Some bacteria fix nitrogen, which converts nitrogen into a bioavailable form.

Bacteria do not have a nucleus, whereas fungi have a nucleus.

No, fungi are eukaryotes and bacteria are prokaryotes. The difference between them is that eukaryotes have a formed nucleus, while prokaryotes do not. Our high school biology, begging

You are bacteria, but bacteria must be fungi.

Fungi are also tiny and can make people sick, but they are fundamentally different from bacteria.

We know that both plants and animals are made up of cells, and both have nuclei inside the cells. Among microorganisms, only fungi have a true nucleus and complete organelles, so they are also called eukaryotic cell-type microorganisms; Bacteria only have a primitive nuclear structure, no nuclear membrane and nucleolus, and few organelles, and belong to prokaryotic cell microorganisms. Viruses, on the other hand, do not have a cellular structure and are protist microorganisms.

There are more than 100,000 kinds of fungi in nature, of which only a very small part can cause human or animal infection, about 300 species. Many fungi are beneficial to humans, such as flour fermentation, soy sauce, vinegar, wine and moldy tofu. Many enzymes in industry and feed fermentation in agriculture are inseparable from fungi.

Many fungi are also edible, such as mushrooms, white fungus, shiitake mushrooms, fungus, etc. Fungi are also a valuable resource in medicine, some of which can be used to produce antibiotics and vitamins and enzymes; Some of them can be used in medicine to treat diseases, such as Chinese medicine Ma Bo, Poria cocos, Cordyceps sinensis, etc.

Fungi are not bacteria. Both fungi and bacteria fall under the category of microorganisms, both fungi and bacteria have a cell structure, both have cytoplasm and cell membranes, and both have ribosomes in their organelles.

The difference between the two is that bacteria are prokaryotic cells without a nucleus, only a region called nucleoid, and the bacterial cell wall is dominant.

The main ingredient is peptidoglycan. Fungi are eukaryotic cells with a nucleus and abundant organelles such as mitochondria, endoplasmic reticulum, Golgi apparatus, etc., and the main component of the fungal cell wall is chitin. Bacteria and fungi are widely distributed in nature, and bacteria can cause bacterial infections such as pneumonia; Many fungi are beneficial to humans, but they can also cause fungal infections.

1 fungus 2 yeast Penicillium 3 white paper fungal folds fungal folds.

1.The bread that had been left out for a few days had flocculent flocculents, and the rotten fruit had mildew on the sedan bends, all of which were due to (mold growth).

2.Fungi are widely used in industrial and agricultural production, (yeast) for brewing, (Penicillium) for penicillin extraction, and (Aspergillus) for the production of sauce and soy sauce.

3。During the noisy trip of "observing the production of spores by mushrooms", the mushrooms should be placed flat on the (white paper), let the (cap) downward, cover the upside-down glass and sell it, and after 3 days, open the glass and pick up the mushrooms, you can see the brown powder left on the white paper, which is the (spores) that fell from the (fold surface).

Bacteria: mainly composed of cell membrane, cytoplasm, ribosomes and other parts, some bacteria also have special structures such as capsule, flagella, and fimbria. The vast majority of bacteria are between in diameter size. And can be divided into three categories according to the shape, namely: cocci, bacilli and spirochetes (pack.

bacteria brackets, spirobacteria, helicobacter). According to the lifestyle of bacteria, it is divided into two categories: autotrophic bacteria and heterotrophic bacteria, of which heterotrophic bacteria include saprophytic bacteria and parasitic bacteria.

According to the oxygen requirements of bacteria, they can be divided into aerobic (completely aerobic and microaerobic) and anaerobic (incompletely anaerobic, aerobic tolerant and completely anaerobic) bacteria. According to the classification of bacterial survival temperature, it can be divided into three categories: cold-loving, normal temperature and high-temperature preference.

Fungus: (fungus) is a eukaryotic organism. The most common fungi are mushrooms, but fungi also include molds and yeasts.

More than 70,000 species of fungi have been discovered, estimated to be only a fraction of all that exist. Most fungi, which were originally classified into animals or plants, are now their own kingdom and are divided into four phyla.

One is a eukaryotic organism and has a nucleus and one is a prokaryotic organism and does not have a nucleus.