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542-2008 StrucLife_TEXT_new
3/25/10
4:01 PM
Page 3
INVESTIGATION
Traveling Seeds
Some seeds fall on the ground near the plant. They will grow into new
plants there. But it’s not good for all the seeds to stay in the same
place. If they do, the plants will become crowded and not have
enough nutrients or water. So seeds have different ways to travel.
Many seeds are carried to new places by the wind. They can travel
many kilometers before they fall to the ground.
Seeds can also be carried to new places by water. If a seed falls into
a stream, the rushing water may carry it to a new spot downstream.
Sometimes a heavy rain may wash a seed to a new spot. The most
famous water traveler is the coconut. The outer coat of a coconut is
waterproof. Inside this coat are air and fibers that help the coconut
float. Deep inside the coconut is the seed of a
new plant. Coconuts fall from trees when they
are ripe. Sometimes they roll into the water,
and the water carries them to new places.
After a while, the waterproof coat wears away.
Then the seed can sprout into a new plant.
Animals spread seeds, too. Squirrels bury acorns,
hickory nuts, and peanuts to eat during the winter. But they never find
all the seeds they bury. Some of the seeds they miss grow into new
plants. Many fruits are eaten by birds and other animals. The seeds in
the fruits pass through the animals’ digestive systems. Then the seeds
leave the animals’ bodies in their droppings.
Some seeds have
sharp hooks or burrs
that can stick to an
animal’s fur or a
person’s clothes. This
is another way seeds
travel to new places.
winter
A red squirrel feeding in
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