What characteristics distinguish gymnosperms from angiosperms? 2. The sperm of seed plants do not require motility. Why? 3. Are all the seed plants homosporous or heterosporous? 4. Discuss three reasons why seeds are reproductively superior to spores: 5. Explain what pollination means: The leaves (needles) of a pine tree are not shed before winter, describe two characteristics that help prevent water loss during periods when water is unavailable from the frozen ground: 6.

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