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Authoritative PPT Summary
Qingdao version of fourth grade science volume 1, plant stem PPT
Part One: Experimental Conclusion
Through observation and experiment, we concluded:
Plant stems are phototropic
As a plant grows from a seedling to a towering tree, what changes and functions do the stems have?
Changes in external morphology of plant stems at different growth stages
Seedling stage: The stems are crystal clear and transport water
Growth stage: branches and leaves are blooming, and the stem is the fastest growing part
Mature stage: The thick stems support the entire plant
Plant stem PPT, part 2 content: discussion summary
Discussion summary: The role of stems
Stems support the plant and transport water and nutrients
Can you design a few experiments of your own to demonstrate that plant stems can transport water and nutrients?
Keywords: Qingdao edition fourth grade science PPT courseware free download, plant stem PPT download, .PPT format;
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"Plant Stems and Material Transport" PPT:
"Plant Stems and Material Transport" PPT Part One Content: Stem Structure 1. Stems are classified according to their shapes: ① Characteristics of upright stems: The stems are relatively hard and can stand upright camphor trees and sugar cane ② Characteristics of entangled stems: The stems are wrapped around other objects to rise Morning glory, ivy ③ creeping..