"Germination of Plant Seeds" PPT courseware

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"Germination of Plant Seeds" PPT courseware

Part One Content: Classroom Observation

Observe the internal structure of kidney bean seeds:

Use a razor blade to make a small opening in the curved part of the seed, peel off the seed coat, and then gently break it open to observe the internal structure with a magnifying glass.

Observe and think:

1.What is the structure of Phaseolus vulgaris seeds?

2. What structures are related to seed germination?

3. What are the important parts of a seed?

Germination of plant seeds PPT, Part 2: Structure of seeds

1. Structure of Phaseolus vulgaris seeds

There is a dark scar on the seed coat on the sunken side of the seed, which is the hilum, which is the trace of the seed being implanted in the pod. There is a small hole near the hilum, which is the seed hole.

When we pinch the seeds hard, water will flow out of the seed hole, indicating that the seed hole is the door for water to enter the seed.

The seed coat is very tough and protects the internal structure of the seed.

2. Structure of corn seeds

1. Germ - develops into stems and leaves

2. Hypocotyl – connects stem and root

3. Radicle - develops into root

4. Cotyledon (only one).

Germination of plant seeds PPT, Part 3: Dicotyledonous plants and monocotyledonous plants

Dicotyledons: Plants whose seed embryos have two cotyledons.

Monocots: Plants whose seed embryo has one cotyledon

Think about it:

1. Which part of the seed structure develops first?

2. Which part of the new plant does the radicle, hypocotyl, and embryo develop into?

3. What changes happened to the cotyledons?

Germination of plant seeds PPT, part 4 content: test you

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

2. The following are all monocotyledonous plants: ( )

A. Sorghum, soybeans, peanuts B. Rice, broad beans, cucumbers

C.Rice, wheat, corn D.Wheat, broad beans, sorghum

3. Wheat seed nutrients are stored in: ( )

A. Cotyledons B. Endosperm C. Germ D. Radicle

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.

Germination of plant seeds PPT, Part 5: Exploration experiment

External conditions required for seed germination

Ask the question: What are the external conditions that affect seed germination?

Make a hypothesis: Seed germination requires water, air, and suitable temperature.

Recommended equipment: petri dishes, absorbent paper, labels, water, wheat seeds.

Design experiment: Each group selects one or more conditions for experimental design and designs a control experiment.

Answer the questions based on the picture on the right:

(1) If this device is placed in a warm

The seeds that can germinate in the place are ________,

The reason is that seed germination requires ___________, ___________, and __________.

(2) If the device is placed in the refrigerator, the thing that cannot germinate is ____________________

Keywords: Jiangsu Education Edition seventh grade biology PPT courseware free download, germination of plant seeds PPT download, .PPT format;

For more information about the PPT courseware "The Life of Green Plants and the Germination of Plant Seeds", please click the "The Life of Green Plants ppt Germination of Plant Seeds" ppt tag.

"Germination of Plant Seeds" PPT:

"Germination of Plant Seeds" PPT Part One Content: Situation Introduction Materials: Many crops are sown in spring. Before sowing, some water is often poured into 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 wet...

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Update Time: 2024-09-08

This template belongs to biology courseware Jiangsu Education Edition Seventh Grade Biology Volume 1 industry PPT template

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