Page 27 - 新思维科学学生用书5 样章

1 Life cycles of flowering plants

Some fruits float

A few seeds are dispersed by water. The fruits must float to

carry the seeds away. The fruits have a spongy covering

that helps them float. For example, the coconut is
dispersed by water.

Mangroves are trees that grow in salty water in warm, wet
regions. Their seeds, called ‘sea pencils’, float upright in the

sea until they are washed onto land.

Some fruits split open or explode

Some fruits disperse their seeds by themselves. The fruits
dry out and split open to let the seeds fall out. Some

fruits explode and shoot out their seeds. For example,

bean pods dry out and explode in hot weather.

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