How is the seed spread?

Most seeds pass animals. Birds squeeze the berries, and then the seeds along with the colonies fall into the ground. Fruits of some plants have special hooks. Clinging to the wool of animals, they can thus make a long journey. Microscopic seeds of orchids are carried by airflows. The air can travel and heavier seeds. Fig tree seeds have a blade like a helicopter, and dandelion seeds are small parachutes. Many legumes have pods that, when matured, dry up, split and sprout seeds around themselves.

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