Seed Dispersal
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  • Introduction
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Seed production is how flowering plants reproduce and ensure the survival of the species. Plants have evolved a variety of ways of dispersing their seeds so that they can spread over a wide area and away from the parent plant.


 

Seeds need to spread away from the parent plant so when they grow they do not have to share water and light. Different flowering plants have evolved many different ways to ensure that their seeds are dispersed. These include:

 

Being carried by the wind:

Carried or eaten by animals:

Floating on water:

Exploding from a pod:

  • Question 1
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Look at these seeds. Their shape tells us that they are dispersed by which method?

 

 

wind

animals

rain

  • Question 2
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Which THREE plants from this list use wind to disperse their seeds?

sycamore tree

poppy

thistle

strawberry

dandelion

  • Question 3
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what method of seed dispersal does the coconut palm use?

wind

eaten by an animal

water

explosion

  • Question 4
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Animals disperse seeds in more than one way. Look at the picture of the burdock seed. The hooks have evolved so that the seeds are spread in which way?


eaten by a bird

blown by the wind

'stuck' to animals' fur

explodes

  • Question 5
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Some animals help with seed dispersal in a different way. What behaviour, shown by squirrels and jays, helps with seed dispersal?

the seeds they eat pass through their gut

they bury seeds to eat later

they enjoy gardening

they collect seeds as a hobby

  • Question 6
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Which TWO of these explains why plants produce fruits? 

so that we can have a balanced diet

so animals eat the fruit and help with seed dispersal

because it tastes nice

  • Question 7
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Which THREE of these fruits contain small seeds which are eaten and pass straight through the gut?

strawberry

avocado

tomato

blackberry

marrow

  • Question 8
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Which THREE of these fruits contain large seeds which are left behind after the fruit is eaten?

banana

peach

apricot

cherry

  • Question 9
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Callie and Tom want to create the correct conditions for their sunflower seeds to germinate (to begin to grow.) Callie says that the seeds need water, warmth and soil. Tom says that the seeds only need water and warmth to begin to grow.

Who do you think is correct?

Callie

Tom

  • Question 10
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Callie and Tom know that the root grows first, followed by the stem. When the leaves grow, the plant needs warmth, water and what else so that it can produce its own food? Tick TWO boxes.

light

darkness

carbon dioxide

oxygen

Progress