"Seeds germinate and form seedlings" PPT

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"Seeds germinate and form seedlings" PPT

Part One: Structure of Seeds

Activity: Observe the structure of seeds

1. Structure of Phaseolus vulgaris seeds

2. Structure of corn seeds

Key similarities and differences between bean seeds and corn seeds:

Same point

Both have seed coat and embryo

difference

Two cotyledons, which store nutrients and have no endosperm.

One cotyledon, with endosperm, which stores nutrients

Seed germination and formation of seedlings PPT, Part 2: Dicotyledons and Monocots

Dicotyledons: Plants whose seed embryos have two cotyledons.

Monocots: Plants whose seed embryo has one cotyledon

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: test you

1. The rice we eat mainly comes from _______ in rice seeds.

2. The structure of a seed that can develop into stems and leaves is (A).

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

3. Cut the soaked corn seeds open and put a drop of iodine solution on the section. You will see ( )

A. The seed coat turns blue B. The endosperm turns blue

C. The hypocotyl turns blue D. The cotyledons turn blue

4. The structure shared by bean seeds and corn seeds is ( )

A. Both have endosperm B. Both have seed coat and endosperm

C. Both have cotyledons and endosperm. D. Both have seed coat and embryo.

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: Situation 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 courseware:

"Seed Germination and Formation of Seedlings" PPT courseware Part One: Situation Introduction Observing the process of seed germination and formation of seedlings, we see a series of changes in the morphology of the seeds. So, what kind of structure are these changes based on? study..

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Update Time: 2024-11-17

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

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