"Spread the seeds far away" New Life PPT Courseware 2

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"Spread the seeds far away" New Life PPT Courseware 2

After the fruit of the fruit pod plant matures, the dry and hard peel will burst automatically under the baking of the sun, or it will burst with a little external force.

Autotransmission (ejection transmission): rapeseed, impatiens, etc.

animal transmission

Some seeds have thorns and barbs on the outside. As long as they are touched lightly, they will immediately adhere to people's clothes or animal hair and feathers.

Such as cocklebur, ghost grass, etc.

Mode of propagation Plant name

Autotransmission: rapeseed, peas, impatiens, etc.

Wind-borne cocklebur, thorngrass, tribulus terrestris

Animal transmission: willow, dandelion, etc.

Water spread lotus, coconut

How plants spread seeds

Mode of dispersal Characteristics of fruits or seeds

Wind spread fruits are light, small, hairy or winged

Water borne There is a lot of air in the fruit and it can float

Animal spread: fruits have hooks, or are delicious and juicy

Self-propagation: the peel will curl after drying and cracking

expand

After the seeds mature, they fall close to the plant instead of spreading far away. What will happen?

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"Spread the seeds far away" New Life PPT download:

"Spread the Seeds Far Away" New Life PPT Download Part One Content: New Knowledge Explanation 1. Group discussion on how rapeseed spreads its seeds. Representative report: 1. What are the characteristics of the rapeseed fruit shell? 2. How are the seeds of rapeseed spread to Far away? 1. Rape fruit..

"Spread the seeds far away" New Life PPT:

"Spreading Seeds Far Away" New Life PPT Part One: The way rapeseed spreads its seeds. Observe the mature rapeseed pods. What are the characteristics of its outer shell? What happens when you gently pinch ripe rapeseed pods with your hands? Collect the scattered rapeseed...

"Spread the seeds far away" new life PPT courseware:

"Spread the Seeds Far Away" New Life PPT Courseware After the fruit matures, what important things will grow inside? After the fruit of the seed pod plant matures, the dry and hard peel will burst automatically under the baking of the sun, or it will burst with a little external force..

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Update Time: 2024-09-13

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

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