"Seed Germination and Formation of Seedlings" PPT courseware

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"Seed Germination and Formation of Seedlings" PPT courseware

Part One: Situation Import

Observing the process of seed germination and seedling formation, we see a series of changes in the morphology of the seeds. So, what kind of structure are these changes based on?

learning target

1. Outline the life history of green flowering plants.

2. Observe the structure of bean seeds and corn seeds.

3. Describe the process of seed germination and seedling formation.

Seeds germinate and form seedlings PPT, part 2 content: course exploration

Explore theme one

Use diagrams or tables to describe the life history of plants

What life phenomenon does the phrase “one grain of millet is planted in spring and ten thousand seeds are harvested in autumn” represent?

Plant growth, development and reproduction

Life history refers to the entire process of growth, development and reproduction experienced by organisms during their lifetime. The life history of green flowering plants is from seed to seed.

Explore theme two

Seeds have seed coat and embryo

1. The shape of seeds

Take a guess:

Seeds vary in shape. So, why can a small seed sprout into a seedling and grow into a towering tree?

2. Structure of seeds

Activity: Observe the structure of seeds

(1) Structure of Phaseolus vulgaris seeds

(2) Structure of corn seeds

3. The process of seed germination

Morphological and structural changes during seed germination

The germ develops into the stems and leaves of the seedling

After the cotyledons or endosperm have provided nutrients, they gradually shrink.

Hypocotyl develops into the part that connects the root and stem

First, the radicle develops into a root

Seeds germinate and form seedlings PPT, the third part: training to meet standards

1. The soybean sprouts and mung bean sprouts that people often eat are mainly formed from which structure of soybean seeds and mung bean seeds ( )

A.Radule B.Gerule C. Hypocotyl D.Cotyledon

2. Which of the seeds can develop into new plant larvae ( )

A.embryo B.germ C.cotyledon D.radicle

3. Among the structures of seeds, which ones can develop into stems and leaves ( )

A. Germ B. Hypocotyl C. Radicle D. Cotyledon

4. When a seed germinates, the first thing to break through the seed coat is ( )

A. Germ B. Hypocotyl C. Radicle D. Cotyledon

Keywords: Beijing Normal University version of seventh-grade biology PPT courseware for free download, seed germination and formation of seedlings PPT download, .PPT format;

For more information about the PPT courseware "The Life History of Green Flowering Plants, Seeds Germinate and Form Seedlings", please click on the "The Life History of Green Flowering Plants, Seeds Germinate and Form Seedlings" ppt tag.

"Seeds germinate and form seedlings" PPT download:

"Seeds Germinate and Form Seedlings" PPT Download Part One Content: Scenario Introduction Materials: Many crops are sown in spring. Before sowing, it is often necessary to pour some water on the ground to make the soil moist. If there has just been a light rain, there is no need to water. It's ready to sow but it's too...

"Seeds germinate and form seedlings" PPT:

"Seeds Germinate to Form Seedlings" PPT Part One Content: The Structure of Seeds Activity: Observe the Structure of Seeds 1. The Structure of Bean Seeds 2. The Structure of Corn Seeds The main similarities and differences between bean seeds and corn seeds: They have the same characteristics. Skin and embryo are different...

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Update Time: 2024-07-28

This template belongs to biology courseware Beijing Normal University Edition Seventh Grade Biology Volume 1 industry PPT template

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