"Seed Plants" What are the green plants in the biosphere PPT courseware 8

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"Seed Plants" What are the green plants in the biosphere PPT courseware 8

By looking, we know that plant seeds come in a variety of shapes and sizes, but their structure is the same.

Complete the experiment according to the content on page p79 of the book. The basic steps for observing living organisms - from the outside to the inside, first form then structure, first macroscopically then microscopically.

By comparison, what are the similarities and differences between beans and corn seeds?

Similarities: There are seed coat and embryo

Difference: The cotyledons of soybean seeds store nutrients. They have only two cotyledons and no endosperm. The endosperm of corn seeds stores nutrients and has a cotyledon.

discuss

1. What part of the seed will develop into a plant in the future?

Embryo (including embryo, radicle, hypocotyl, cotyledons)

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

The endosperm stores a large amount of starch (organic matter).

3. Which one has stronger vitality, spores or seeds? Why?

4. What is an important reason why seed plants are more adapted to the terrestrial environment?

Can produce seeds

What did you discover through comparison?

The seeds of pine trees are naked and not covered with pericarp, while the seeds of peach trees are covered with pericarp. What pine trees and peach trees have in common is that they both produce seeds.

discuss

Why are angiosperms more suitable for terrestrial life than gymnosperms?

1. Fruits can protect seeds from insect bites

2. Fruits often have characteristics suitable for spreading.

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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.

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

"Seed Plants" What are the green plants in the biosphere PPT courseware 7 Learning objectives 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 gymnosperms in the local area..

"Seed Plants" What are the green plants in the biosphere PPT courseware 6:

"Seed Plants" What are the green plants in the biosphere PPT courseware 6 Observing the structure of seeds Purpose requirements: 1. Understand the structure of seeds. 2. Learn how to observe the structure of seeds. Materials and tools: Soaked beans and corn seeds, razor blade, magnifying glass, pipette..

"Seed Plants" What are the green plants in the biosphere PPT courseware 5:

"Seed Plants" What are the green plants in the biosphere PPT courseware 5 Observing the structure of seeds Purpose requirements: 1. Understand the structure of seeds. 2. Learn how to observe the structure of seeds. Materials and tools: Soaked beans and corn seeds, razor blade, magnifying glass, bean sprouts...

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Update Time: 2024-10-20

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

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