"Bacteria" Bacteria and Fungi PPT Courseware 7

Description

"Bacteria" Bacteria and Fungi PPT Courseware 7

learning target

1. Be able to describe the morphological structure, nutrition and reproductive methods of bacteria, fungi and viruses as well as their relationship with humans.

2. Through understanding of the relationship between bacteria, fungi, viruses and human beings, establish a dialectical view of two parts and the values ​​of life science, and develop good hygiene habits to prevent diseases.

Read pages 62 to 67 and fill in the blanks below:

1. Bacteria, fungi and viruses are small in size and simple in structure, usually ________. (Page 62, first paragraph)

2. Bacterial cells have three basic forms: ______, ______, and ______. Bacteria reproduce mainly through ______. (Page 62, third paragraph)

3. Fungi have real nuclei in their cells, live ______ or ______ life, and mainly carry out ______ reproduction. (Page 63, third paragraph)

4. In the absence of oxygen, yeast decomposes glucose to produce alcohol and carbon dioxide. This process is called ______. (Page 63, fourth paragraph)

5. Mold absorbs nutrients through ______ and carries out ______ life. Penicillium secretes ______, which can inhibit bacterial growth and is an effective antibiotic. (Page 64, first paragraph)

6. Saprophytic fungi can promote ______ in nature, and ______ fungi can make humans, animals and plants sick or die. (Page 66, first paragraph)

1. Distribution: Wide distribution range

2. Morphological structure: a single-celled organism with a cellular structure and a tiny body

Reproduction by division is the most common and dominant way of reproduction for bacteria.

The relationship between bacteria and humans:

Food manufacturing: acetic acid bacteria - vinegar; lactic acid bacteria - pickles, yogurt, cheese

Methanogens - Biogas

A few bacteria make people sick: Shigella dysenteriae - dysentery; Diplococcus pneumoniae - pneumonia

Food spoilage: soft rot bacteria - vegetable rot; Bacillus subtilis - food spoilage

nitrogen fixation

Relationship with humans:

1. Parasitic on human skin: tinea pedis, tinea brachia

2. Preparation of antibiotics: penicillin, etc.

Edible, used as medicinal materials, some highly toxic, and used as decomposers in the biosphere

1. The main reproductive methods of bacteria are:

A. Fission reproduction B. Spore reproduction C. Budding reproduction D. Ovoreproduction

2. The reason why canned food will not go bad for a long time is:

A. The seal is very tight and bacteria have no chance to invade.

B. The seal is very tight and the bacteria cannot breathe and die.

C. High temperature sterilization before capping, there will be no bacteria in the can after capping

D. High temperature and high pressure affect the reproduction of bacteria in the tank

3. The main reproductive methods of yeast are:

A. Schizophrenia B. Sporogenesis C. Budding reproduction D. Conjugation reproduction

4. Among the following organisms, the ones that do not have cellular structure are:

A. Bacteria B. Macrobrachium C. Tobacco mosaic virus D. Earthworms

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For more information about the "Bacteria Bacteria and Fungi" PPT courseware, please click on the Bacteria PPT Bacteria and Fungi PPT tab.

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Update Time: 2024-10-01

This template belongs to biology courseware People's Education Edition Biology for Grade 8, Volume 1 industry PPT template

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