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

​

swan plants

​

cottonwood trees

​

Fleabane

​

​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.

​

​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

Fill in the Blanks

Multiple Choice

dandelion

Fill in the Blanks

Fill in the Blanks

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