"Flowers and Fruits of Plants" PPT courseware

Category	Format	Size
Qingdao Edition Fourth Grade Science Volume 1	pptx	6 MB

"Flowers and Fruits of Plants" PPT courseware

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Upload Time: 2024-11-22

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"Flowers and Fruits of Plants" PPT courseware

Part One: Structure and Classification of Flowers

Do all flowers have these four-part structure?

flower

Complete flower: A flower has four parts: sepals, petals, pistils, and stamens. Such as cabbage flowers, peach flowers, broad bean flowers, rape flowers, etc.

Incomplete flower: A flower in which one to three parts are missing. For example, pumpkin and cucumber flowers lack stamens or pistils; poplar and willow flowers lack sepals, petals, stamens or pistils.

Unisexual flowers are those with only stamens or pistils in a flower, such as pumpkins and loofahs.

Hermaphroditic flowers A flower with stamens and pistils present at the same time is called an hermaphroditic flower, such as the flowers of peach and wheat.

Flowers and fruits of plants PPT, part 2: Characteristics of fruits

Common characteristics of fruits: including peel and seeds

Stamens and pistils are the reproductive organs of plants.

Pollen falls on the stigma of the pistil, a process called pollination, and after pollination the plant may bear fruit.

Flowers and fruits of plants PPT, the third part: expansion activities

Choose a female loofah flower that has not yet opened, cover the flower with a plastic bag, and observe after a period of time whether the flower has produced fruit.

Keywords: Qingdao edition fourth grade science PPT courseware free download, plant flowers and fruits PPT download, .PPT format;

For more information about the "Flowers and Fruits of Plants" PPT courseware, please click the "Flowers and Fruits of Plants" ppt tag.

"Flowers and Fruits of Plants" PPT:

Qingdao version of the first volume of fourth grade science, plant flowers and fruits PPT, the first part of the content: classification of flowers, the basic structure of peach blossoms. A flower is mainly composed of sepals, petals, pistils and stamens. It can be seen through observation: there is pollen inside the stamens, and the lower part of the pistil...

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Update Time: 2024-11-22

This template belongs to science courseware Qingdao Edition Fourth Grade Science Volume 1 industry PPT template

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Plant flowers and fruits ppt

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"Flowers and Fruits of Plants" PPT courseware