SEED DISPERSAL

SEED DISPERSAL

SEED DISPERSAL

• Wind dispersal

• Water dispersal

• ​Animal dispersal

• Explosions

​Seeds from plants like dandelions and cottonwood trees are light and have feathery bristles and can be carried long distances by the wind.

dandelion (n) hoa bồ công anh

feathery​ (a) mảnh, nhẹ như lông tơ

​1. Wind dispersal

​Have you ever blown on a dandelion head and watched the seeds float away?

​​dandelion

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swan plants

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cottonwood trees

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Fleabane

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​Seeds from plants are light and have feathery bristles and can be carried long distances by the wind.

maple trees

​

kauri

​

​Some plants, like kauri and maple trees, have ‘winged’ seeds. They don’t float away but flutter to the ground.

flutter (v) rung rinh

​2. Water disperal

Many plants have seeds that use water as a means of dispersal such as mangrove trees, coconut trees, lotus, Kōwhai trees...

If the seeds fall in the water, they are carried away by the tide to grow somewhere else.​

​Mangrove trees

Kōwhai trees

​3. Animal disperal

Subject | Subject

barb (n) (thực vậy học) gai, râu

hook (n) cái móc​

​Birds often fly far away from the parent plant and disperse the seeds in their dropping.

​

Some seeds have hooks or barbs that catch onto an animal’s fur, feathers or skin.

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​4. Explosion

Subject | Subject

​Some plants, like peas, gorse and flax, have seedpods that dry out once the seeds are ripe.

​

When dry, the pods split open and the seeds scatter.

​gorse (n) cây kim tước

​flax (n) cây lanh

scatter (v) rải, gieo

pod (n) vỏ (quả đậu)​

ripe (a) chín​

​peas

Match

Match the following picture

gorse

cottonwood trees

Kōwhai trees

mangrove trees

flax

• gorse

• cottonwood trees

• Kōwhai trees

• mangrove trees

• flax

Fill in the Blanks

How many methods to disperse plant's seeds?

Fill in the Blanks

Seeds from plants like dandelions are

and have feathery bristles.

Multiple Choice

dandelion

Fill in the Blanks

Seeds from plants like dandelions and cottonwood trees are light and have feathery bristles and can be carried long distances

.

Fill in the Blanks

Birds often fly far away from the parent plant and _ the seeds in their dropping.

Multiple Select

​Some plants, like peas, gorse and flax, have seedpods that dry out once the seeds are ripe.

Multiple Choice

When _ , the pods split open and the seeds scatter.

• warm

• wet

• dry

• cold