"Asexual Reproduction of Organisms" PPT

Description

"Asexual Reproduction of Organisms" PPT

Part One: Goals

1. List the asexual reproduction methods of organisms

2. Try plant grafting or cuttings

3. Describe plant tissue culture techniques

Biological Asexual Reproduction PPT, Part 2: Course Section

Section 1. List the asexual reproduction methods of organisms

After observing and thinking, my deskmate said

1. What is it doing?

2. What is the result after this process occurs?

3. What changes will happen to the buds later?

4. Why does a creature like hydra have to behave this way?

plant vegetative reproduction

1. Concept: Plants rely on asexual reproduction of vegetative organs (roots, stems, leaves).

2. Advantages:

(1) Able to maintain the excellent traits of the plant parent

(2) Speed ​​up plant reproduction.

3. Methods: Grafting, cutting and layering.

Section 2: Try plant grafting

Read the contents of P4-5, observe the pictures, and think:

1. What is scion? What is rootstock?

2. What are the two types of grafting? How are the scions and rootstocks treated by the two grafting methods?

3. What are the key steps to ensure the survival of plants after grafting?

grafting

Scion: The grafted bud or branch.

Rootstock: The plant that is grafted.

Grafting: grafting buds or branches with buds from one plant to another plant to heal them into a complete plant.

Section 3. Describe plant tissue culture

1. Concept: Plant organs, tissues or cells are cultured under sterile conditions on a medium containing a variety of nutrients and plant hormones, so that they can gradually develop into complete plants.

2. Advantages:

(1) Produce a large number of plants in a short period of time

(2) Prevent plant viruses from invading

(3) Cultivate new varieties with excellent and high yields

3. Examples

Biological Asexual Reproduction PPT, Part 3: Summary: Thoughts and Discussions

1. What are the ways of asexual reproduction of organisms?

2. How is it different from sexual reproduction?

Keywords: Jiangsu Education Edition eighth grade biology PPT courseware for the second volume free download, biological asexual reproduction PPT download, .PPT format;

For more information about the PPT courseware "Asexual Reproduction of Biology", please click the "Asexual Reproduction of Biology" ppt tab.

"Asexual Reproduction of Organisms" PPT courseware:

"Asexual Reproduction of Biology" PPT Courseware Part One Content: Asexual Reproduction Asexual reproduction: a reproductive method that produces new individuals directly from the mother without the combination of sexual reproductive cells. Find it. Students work in groups of 2-3 and use a microscope to observe the overall assembly of hydra. Discuss...

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Update Time: 2024-11-22

This template belongs to biology courseware Jiangsu Education Edition 8th Grade Biology Volume 2 industry PPT template

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