"Fungi" Bacteria and Fungi PPT Courseware 7

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"Fungi" Bacteria and Fungi PPT Courseware 7

Review and consolidate

1 The first person to discover the existence of bacteria was _______.

2 _______ proved through rigorous scientific experiments that bacteria do not occur naturally, but are produced by bacteria that already existed and are called.

3 Bacteria have _______-like, _______-like and _______-like shapes.

4 The main difference in cell structure between bacteria and animals and plants is that although bacteria have areas where _______ are concentrated, they do not have formed _______. Such creatures are called _______

5 Most bacteria can only live on readily available _______, and they are the _______ers in the ecosystem. Its nutritional mode is _______

6 _______ is the dormant body of bacteria and has strong resistance to _______ environment.

Do you want to know

1. How much do you know about mushrooms? Where can I find mushrooms? What about its structure? How does it reproduce? What nutritional value does it have?

2. Under what conditions will food become moldy? Why do things get moldy easily in summer?

3. Which organisms are fungi? What characteristics do they have in common?

When and where are mushrooms easily found? What does this mean?

Mushrooms are easy to pick from moist tree trunks or grass in the early morning or after rain in summer or autumn.

This shows that fungi are suitable for living in warm, moist and organic-rich environments.

think:

Under what conditions is food likely to become moldy?

Conditions for mold growth: Mold is prone to occur in humid, dark, unventilated, and warm conditions.

Culture of Penicillium: Place moist orange peel on a piece of clean glass, put a small glass cup on it, and place it in a dark place with a temperature slightly higher than 20ºC for cultivation.

Culture of Aspergillus: Place a small piece of steamed bread on a piece of clean glass, put a small glass cup on it, and place it in a dark place with a temperature slightly higher than 20ºC for cultivation.

Observe and think

What are the differences in morphology and color between Penicillium and Aspergillus? What do they have in common?

Differences: Penicillium is ________ in color and the hyphae with spores look like ________;

Aspergillus is __________ in color and the sporulated hyphae look like _________.

Common points: 1. They are all multicellular fungi, the bacteria are composed of ________, and they can all produce ________;

2. Every cell has structures such as cell wall, cell membrane, cytoplasm, and ________.

Summary: Main characteristics of fungi

1. There are unicellular and multicellular.

2. Have a true nucleus (eukaryotes).

3. Use spores to reproduce offspring.

4. The nutritional method is heterotrophic.

Types of fungi

1. Fungi in daily life

(1) _____: Can cause food to become moldy.

(2) Some molds can be used to make bean paste, fermented bean curd, cheese and other foods.

(3) Edible fungi: mushrooms, fungus, white fungus, etc.

2. multicellular fungi

(1) Penicillium and Aspergillus

①Bacteria: composed of _____ connected by many cells.

②Each cell structure: cell wall, cell membrane, cytoplasm and ________.

(2) Mushrooms: made up of mycelium.

3. Single-celled fungi - yeast

It can be used for making wine, making _____ and steaming steamed buns.

Types of fungi

[Breakthrough 1] Among the following fungi, which one has a single-cell structure ( )

A. Penicillium B. Aspergillus C. Yeast D. fungus

[Breakthrough Points] There are single-cell fungi, such as yeast; there are also multi-cell fungi, such as Penicillium, Aspergillus, and large fungi-mushrooms.

【Breakthrough 2】What makes fungi more complex than bacteria is ( )

A. The cell structure of fungi includes cell wall, cell membrane, and cytoplasm

B． Fungal cells contain chlorophyll

C. Fungal cells contain a formed nucleus

D. Fungi are multicellular organisms

[Breakthrough Points] Fungi have both multicellular organisms and single cells, and the structure of each cell includes cell wall, cell membrane, cytoplasm and nucleus, while bacteria do not have a formed nucleus.

How fungi reproduce

[Breakthrough 3] The reproductive method of the mushroom shown in the picture below is ( )

A. Nutritional reproduction B. sporogeny

C. Budding reproduction D. seed reproduction

[Breakthrough Points] The reproduction method of mushrooms: spore reproduction.

[Variation Training 3] Which of the following organisms cannot produce spores ( )

A. Bacteria b. yeast

C. Mold D. mushroom

Analysis: Bacteria reproduce by dividing.

[Knowledge summary] How yeast reproduces: Yeast is a single-celled fungus that can reproduce through spores or budding.

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Update Time: 2024-07-05

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

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