"Fungi" PPT

Description

"Fungi" PPT

Part One: Learning Objectives

1. What are the common fungi in life?

2. What are the structural characteristics of fungal cells?

3. How do fungi reproduce?

Does the mushroom in the picture have roots, stems, and leaves? Do they need light to grow? Why are they called fungi and not plants?

Part 2: Classification of fungi

Single-celled fungi: yeast, budding, sporulation

Multicellular fungi:

Molds: Penicillium, Aspergillus, Mucor, etc.

Large fungi: mushrooms, fungus, etc.

Part Three: Knowledge Structure

1. Yeast

Shape: single cell, oval

Structure: cell wall

cell nucleus

cell membrane

cytoplasm

vacuole

Nutritional mode: Heterotrophic

2. Morphological structure of mold: The cells are composed of hyphae

spore

erect hyphae

cell nucleus

vegetative hyphae

Part Four: Observation and Thinking

1. What are the differences in shape and color between Penicillium and Aspergillus? What do they have in common?

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

Aspergillus is _________ in color and the spore-bearing hyphae look like _________.

Common points: 1._______ fungi, the bacterial body is composed of ________, and can produce ________;

2. Each cell has a cell wall, cell membrane, cytoplasm, ________ and other structures.

3. Nutritional methods are all heterotrophic

2. When and where is it easy to pick mushrooms? 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.

3. Molds and mushrooms are both fungi. What do they have in common in their nutritional methods?

The nutritional methods are all heterotrophic, using readily available organic matter to obtain the materials and energy needed for life activities.

Part 5: Main characteristics of fungi

(1) There is a true nucleus in the cell. Fungi, animals and plants are called eukaryotes, while bacteria are prokaryotes.

(2) Fungi mostly reproduce through spores

(3) There are no chloroplasts in the body, and the nutritional method is heterotrophic.

(4) Suitable for living in warm, humid and organic-rich environments

Part Six: Practice

1. Judgment question

(1) Fungi can be unicellular or multicellular ( )

(2) There are no chloroplasts in fungal cells ( )

(3) Mushrooms, like mold, are also composed of a large number of mycelium. ( )

(4) Fungi such as molds and mushrooms are prokaryotes ( )

2. Multiple choice questions

(1) Although mushrooms often appear in the woods, they are not plants. This is because ( )

A There is no nucleus in the cell B There is no chloroplast in the cell

C There are no spores in the cells D There are no hyphae in the cells

(2) Among the following organisms, which ones are eukaryotes ( )

A Mycobacterium tuberculosis B Yeast C Acetobacter D Pneumococcus

(3) Penicillium is named after its color. The green color of Penicillium mainly comes from ( )

A erect hyphae B vegetative hyphae C mature spores D penicillin

Homework

1: Mold reproduces by spores, which are very light and can float in the air. In summer, damp food, clothes or leather shoes provide the necessary environmental conditions and nutrients for the germination of spores, so mold is easy to grow.

2: Check whether the place where food is stored at home is ventilated, whether the environment is dry, and whether the wardrobe where clothes are stored is damp. In fine weather, dry food and clothing to prevent the growth of mold.

3: Mushroom growth requires a certain temperature, a humid environment and rich organic matter. Therefore, when cultivating edible mushrooms, on the one hand, it is necessary to keep the breeding site clean, warm and moist; on the other hand, it is necessary to provide the organic matter needed for mushroom growth.

Keywords: Qingdao version fifth grade science PPT courseware free download, fungi PPT download, .PPT format;

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Update Time: 2024-10-01

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