"Common Plants" PPT courseware

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"Common Plants" PPT courseware

Part One: Classroom Thoughts

Thinking: Why do most plants bloom? What do plants bloom for?

Fact: Flowering is an essential step in the reproduction process of most plants.

fruit formation

After pollination, the ovary can develop into fruits and the ovules into seeds.

Seed plants - plants that produce seeds

Fruits usually contain seeds inside

Thinking: Comparing the fruits of peas and red pine, what differences do you find between them?

Angiosperm seeds are covered with pericarp

The seeds are not exposed and are covered with pericarp;

It has six major organs: roots, stems, leaves, flowers, fruits and seeds;

The most diverse and widely distributed

Common plants PPT, part 2: Angiosperms are most closely related to humans.

1. Food Example: Cereals, vegetables, fruits

2. Beverages Example: coffee, tea, wine

3. Seasonings Examples: oil seeds, sugar cane, beet, ginger, red pepper, star anise, cinnamon

4. Wood Examples: nan maple, camphor bamboo

5. Drugs Examples: Coptis, ginseng, Polygonum multiflorum, Eucommia ulmoides, licorice

6. Spices Examples: mint, spearmint, patchouli

7. Dyes Examples: Hematoxylin, rosewood, earth, agarwood, ginger

8. Clothing materials Example: jute, cotton, kapok

9. Other supplies Examples: Rubber, various grasses and bamboo (paper), palmetto (toothpicks)

Common plants PPT, the third part: little knowledge

During the seed development process of angiosperms, the pericarp wraps around the seeds and plays the role of ( );

After the seeds mature, the peel rots and shrinks ( )

This expands the range of life for future generations and promotes the prosperity of the species.

Therefore, angiosperms are more adaptable to terrestrial life than gymnosperms, are more widely distributed, and have more types.

Common plants PPT, part 4: Please give it a try

1. Do plants with seeds necessarily have fruits?

Not necessarily, gymnosperms have no fruits.

2. The characteristics of angiosperms that are different from gymnosperms are ( )

The same characteristics are ( )

A produces seeds

B seeds are not protected by seed coat

C The seeds are covered with pericarp.

D Seeds are large in size and mass

3. The following description of the common characteristics of tomatoes and pine trees, the wrong thing is ()

A can produce seeds

B Roots, stems, and leaves are all relatively developed

C are all plants and can perform photosynthesis

D. The seeds are covered with pericarp.

Keywords: Zhejiang Education Edition seventh grade science PPT courseware free download, common plant PPT download, .PPT format;

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"Common Plants" PPT:

Content of the first part of "Common Plants" PPT: Let's talk about which of the vegetables and fruits you usually eat are the fruits of plants? Are seeds found in the fruits? Do bananas have seeds? Plants that can produce seeds and reproduce offspring through seeds are called seed plants. They cannot...

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Update Time: 2024-11-22

This template belongs to science courseware Zhejiang Education Edition Seventh Grade Science Volume 1 industry PPT template

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