"Seed Plants" What are the green plants in the biosphere PPT courseware 7

Description

"Seed Plants" What are the green plants in the biosphere PPT courseware 7

learning target

1. Name the main structure of seeds and describe the similarities and differences between bean seeds and corn seeds.

2. Use observation methods to identify the structure of seeds.

3. Identify common local gymnosperms and angiosperms.

4. Participate in activities of collecting seeds and fruits, and experience communication and cooperation with others.

Exploration 1

Observe seed structure

1. Observe the structure of kidney bean seeds

2. Observe the structure of corn seeds

From the outside to the inside

form first then structure

Macro first, then micro

The structure of corn seeds

1. In addition to the seed coat, what else is there in the outermost layer?

Peel; the peel is very thin and closely adheres to the seed coat

2. Which part of the seed can develop into a plant in the future?

Embryo, which is actually a young life form

The embryo is the larvae of a new plant, consisting of cotyledons, embryos, hypocotyls, and radicles.

discuss

1. What is the function of seed coat? What is the function of the cotyledons of legumes?

2. Which part of the seed will develop into a plant in the future?

3. Turning blue when exposed to iodine is a characteristic of starch. What does it mean when corn turns blue when exposed to iodine?

4. What are the similarities and differences between bean seeds and corn seeds? Please complete the following table based on your observations:

Knowledge Navigation

Gymnosperms are relatively large individuals, with well-developed ____, four organs ____, ____, ____, and ____. Their seeds are ____ and they live in the ____ environment.

Angiosperms have six organs: ＿＿, ＿＿, ＿＿, ＿＿, ＿＿, ____. The outside of the seeds are coated with __, also called ___________. They are the highest group in the biosphere, with the strongest adaptability, the most species, and an extremely wide distribution.

Think about it, talk about it

The relationship between seed plants and humans

Providing people with food, vegetables, fruits, flowers, medicines, wood, etc.

It also creates a comfortable living environment for us

Doctoral evaluation team

1. There is a riddle describing peanut fruit: "A hemp house, a red tent, and a fat white man lives inside." The hemp house refers to the ____ of peanuts, the red tent refers to ______, and the white fat man refers to ____.

2. The common structure of seeds is ( )

A. Seed coat, embryo and cotyledons

B. Seed coat, endosperm and cotyledons

C. Seed coat, embryo

D. Seed coat, germ, embryo

3. The seed embryo of the following plants has two cotyledons ( )

A. Corn

B. Rice

C. Wheat

D. peanuts

4. In the seed structure ( ) is a new plant body; rice is a rice seed ( )

A. embryo

B. Seed coat

C. Endosperm

D. Cotyledons

Compliance test

1. Which of the following plants is a seed plant ( )

A. Kelp B. Willow c. Maidenhair fern D. Azolla

2. Compared with peach trees, the main difference between pine trees is ( )

A. There are seeds inside the fruit B. No peel seeds are exposed outside

C. The ovule is protected by the ovary

D. Cones are fruits with seeds covered by the pericarp.

3. Tanghuai, located on the west bank of the Liaocheng Ancient Canal, has luxuriant branches and leaves even though it is old, becoming a beautiful scenery in the waters north of the Yangtze River. The tree belongs to ( )

A. Ferns B. Gymnosperms

C. Angiosperms D. Bryophyta

4. In the plant kingdom, the most diverse and widely distributed type of plant is ( )

A. Algae B. Ferns

C. Gymnosperms D. angiosperms

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For more information about the PPT courseware "What are the green plants and seed plants in the biosphere?", please click the What are the green plants in the biosphere ppt seed plants ppt tag.

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Update Time: 2024-09-15

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

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