"Blooming and Fruiting" Plant Growth Changes PPT Courseware 2

Description

"Blooming and Fruiting" Plant Growth Changes PPT Courseware 2

teaching objectives

In the process of plant growth, flowers go through the process of blooming and fading, and then bear fruit after the flowers wither.

Flowers include sepals, petals, stamens and other parts.

Fruit develops from part of the flower.

There are seeds in the fruit.

observe flowers

Carefully tear off each part of the flower from the outside to the inside and glue it to the activity booklet.

Study how many parts a flower has and how each part is related to the result.

What are the components of flowers?

Flower is the reproductive organ of angiosperms and consists of flower stalk, receptacle, calyx, corolla, pistil and stamens. The pedicel, also called the pedicel, is the branch on which the flower grows. The receptacle is the top of the flower stalk, where other structures of the flower are attached. The calyx is generally a green leaf-like thin slice, attached to the outermost whorl of the receptacle, and plays a role in protecting the inside of the flower during the bud period. The corolla is composed of petals, located inside the calyx. It has bright colors and a special fragrance, which can attract insects for pollination. Stamens grow inside the corolla, and their number is often an integral multiple of the number of sepals and petals. They are composed of filaments and anthers. The anthers are an important part and produce pollen (with 2 sperms inside). The pollen is released when mature. The pistil is located in the center of the flower and consists of three parts: the stigma, the style and the ovary. The stigma is the place where pollen is received. The ovary is the fertile part containing one or more ovules (with egg cells and polar nuclei inside). The ovary The ovules will develop into fruits in the future, and the ovules will develop into seeds in the future.

Fruit structure and formation

The structure of the fruit is generally the outer pericarp, which contains the seeds. The peel can be divided into three layers: exocarp, mesocarp and endocarp. The fruits of most plants develop from the ovary, which is called a true fruit. There are also fruits of some plants that have other parts besides the ovary. The most common one is that the ovary and the perianth or receptacle form the fruit together. Such fruits are called false fruits, such as pears, apples, pomegranates, sunflowers and melons. The fruits of the crop. In some plants, one flower has many detached pistils gathered on the receptacle, and the small fruits formed by the pistils are gathered on the receptacle. This is called aggregated fruit, such as the fruits of lotus, strawberry, magnolia and other plants. There are also fruits of some plants that develop from an inflorescence, which is called a compound fruit (inflorescence fruit, flower cluster fruit), such as mulberry, pineapple, fig, etc.

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For more information about the PPT courseware "The Growth Changes of Plants, Blooming and Fruiting", please click the "Growing Changes of Plants, Blossoming and Fruiting" ppt tag.

Download the PPT "Blooming and Fruiting" Plant Growth Changes:

"Blooming, Fruiting" PPT Download of Plant Growth Changes Part One: Introduction of New Knowledge Impatiens Is there any connection between flowering and fruiting? ... ... ... PPT has blossomed and bears fruit, the second part of the content: new lesson explanation, small activities before class: observing phoenix...

"Blooming and Fruiting" Plant Growth Changes PPT:

"Blooming and Fruiting" Plant Growth Changes PPT Part One: Organize and communicate observation records and review the growth process of impatiens. When seeds germinate, they first grow roots, then stems and leaves; the roots fix the impatiens in the soil. And absorb water and nutrients; leaves undergo light...

"Blooming and Fruiting" Plant Growth Changes PPT Courseware 3:

"Blooming and Fruiting" Plant Growth Changes PPT Courseware 3 The height of impatiens grows slowly or stops growing. What factors may be related to it? Flowering! Result! Flower buds grow in the leaf axils. When flower buds appear on impatiens, the plant will no longer grow taller or will grow slowly...

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Update Time: 2024-11-22

This template belongs to science courseware Third Grade Science Volume 2, Textbook Edition industry PPT template

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