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What are differences between Gymnosperm & Pteridophytes?

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1. In gymnosperms, roots are usually tap roots. 2. Majority of them show xerophytic characters. 3. In gymnosperms, cambium is present and the secondary wood is common. 4. Neck canal cells and sometimes venter canal cell are absent in the archegonia,making the latter a small-sized body. 5....
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1. In gymnosperms, roots are usually tap roots. 2. Majority of them show xerophytic characters. 3. In gymnosperms, cambium is present and the secondary wood is common. 4. Neck canal cells and sometimes venter canal cell are absent in the archegonia,making the latter a small-sized body. 5. In gymnosperms, microspores or pollen grains are shed only for a small period, whereas the megaspore is retained permanently within the mega sporangium. 6. Due to the permanent retention of the megaspore in the ovule, it forms the seeds. 1. In pteridophytes, roots are usually adventitious in nature 2. Most of them are hydrophytes, i.e. grow in shady humid places 3. In pteridophytes, ambium is absent, in pteridophytes and the primary growth is seen in most of the pteridophytes. 4. Neck canal cells and venter canal cells are present in the archegonia. 5. In pteridophytes, microspores and megaspores develop independently after being shed from their respective sporangia. 6. In pteridophytes, seed formation is absent. Seed-like structures, however, are formed in some genera (e.g. Lepidodendron, Miadesmia). 7. In pteridophytes, pollen tubes are not formed. read less
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