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Unit 1 Spores and Seeds
Despite their many shortcomings, spores do have some advantages over seeds. Spores
are extremely light compared to seeds, and can thus be dispersed more easily and over
greater distances by even light breezes. The most common type of spore plant is the fern,
which releases spores from the underside of its leaves. Some species of fern may be said
to bridge the evolutionary gap between spore-producing plants and seed-producing
plants. The presence of ferns dates back over 300 million years, and over the course
of their long evolution, some have evolved into seed-bearing plants, perhaps some of the
first.
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Despite their many shortcomings, spores do have some advantages over seeds. Spores
are extremely light compared to seeds, and can thus be dispersed more easily and over
greater distances by even light breezes. The most common type of spore plant is the fern,
which releases spores from the underside of its leaves. Some species of fern may be said
to bridge the evolutionary gap between spore-producing plants and seed-producing
plants. The presence of ferns dates back over 300 million years, and over the course
of their long evolution, some have evolved into seed-bearing plants, perhaps some of the
first.
-7-
