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Primitive Land Plants Retained Swimming Sperm and Required Water to Reproduce

Plants produce sperm and eggs. Reproduction out of water could create some challenges. Some plants (primitive marine plants) have sperm that swims. Some plants even have swimming eggs.

The first land plants retained swimming sperm. They were restricted to the swamps and marshes. Sperm and egg cells would be released into the water or areas where the ground would be covered with water.

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