In addition to seeds, which of the following characteristics is unique to the seed-producing plants? A) sporopollenin B) lignin present in cell walls C) pollen D) use of air currents as a dispersal agent

In addition to seeds, which of the following characteristics is unique to the seed-producing plants?

A) sporopollenin
B) lignin present in cell walls
C) pollen
D) use of air currents as a dispersal agent
E) megaphylls

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In addition to seeds, which of the following characteristics is unique to the seed-producing plants? A) sporopollenin B) lignin present in cell walls C) pollen D) use of air cur…

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