"Blooming and Fruiting" Life of Angiosperms PPT Courseware 2

Description

"Blooming and Fruiting" Life of Angiosperms PPT Courseware 2

Situation import

The flowers of many plants are so colorful and fragrant that passers-by can't help but stop and admire them, and even come up to smell the refreshing fragrance. Have you ever thought about what the beautiful colors and overflowing fragrance of flowers mean to the plants themselves? In fact, there are many plants whose flowers do not have bright colors and fragrances. Why is this?

learning target

1. Can give examples of the structure of flowers.

2. Can describe the process of pollination and fertilization.

3. Know the formation process of fruits and seeds, and develop the habit of caring for flowers.

discuss

1. Which part of the flower will develop into a fruit in the future? ovary.

2. Which structures of flowers are most important for plant reproduction?

Stamens (stamens and pistils).

pollination and fertilization

Ask students to study relevant content on their own and think about the following questions:

1. The concept and method of pollination.

2. The process of fertilization.

Fruit and seed formation

Invite students to self-study relevant content and think about:

How are fruits and seeds formed?

Think about it: in life, we often find that the ears of corn have missing kernels; when eating melon seeds, the kernels are often hollow. What causes this? What is the solution?

Mainly caused by insufficient pollination.

The solution is: artificial assisted pollination.

Artificial assisted pollination of corn

1. Take a paper bag or plastic bag and cover the stamens of the corn, gently shake the corn stalk to collect pollen.

2. Pour the collected pollen onto the stigma of the pistil.

Class summary

1.Flower structure:

Flower stalk, receptacle, calyx, petals,

Stamens (anthers, filaments),

Pistil (stigma, style, ovary)

2. Pollination and fertilization

3. Fruit formation:

The fruit develops from the ovary, the ovary wall develops into the pericarp, and the ovules develop into seeds.

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For more information about the PPT courseware "Blooming and Fruiting in the Lifetime of Angiosperms", please click the "Blooming and Fruiting in the Lifetime of Angiosperms" ppt tag.

"Blooming and Fruiting of Plants" PPT courseware:

"Blooming and Fruiting of Plants" PPT courseware

Part One Content: The Composition of Flowers

corolla

The crown is made of petals.

Different types of flowers have different sizes, colors and numbers of petals.

calyx

The calyx is the part that supports the petals. When it is not blooming...

"Blooming and Fruiting of Plants" PPT:

"Blooming and Fruiting of Plants" PPT Part One Content: Classroom Thinking Thinking: What is the meaning of plant flowering? Which part of the flower will develop into fruit in the future? Which structures in flowers are most important for plants to reproduce? 1. Flower structure stamens ..

"Blooming and Fruiting" Life of Angiosperms PPT Courseware 7:

"Blooming and Fruiting" Lifetime of Angiosperms PPT Courseware 7 Learning Objectives 1. What is the main structure of flowers 2. Describe the process of pollination and fertilization 3. Clarify the relationship between flowers, fruits and seeds 1. The structure of flowers The main structure of flowers is stamens and pistil. From flower to fruit requires experience...

File Info

Update Time: 2024-07-30

This template belongs to biology courseware People's Education Edition seventh grade biology volume 1 industry PPT template

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