Question

distinguish between pteridophyta and gymnosperms​

Answer 1

Answer:

The sporophytic plant body is by and large arborescent in gymnosperms while it is not so in pteridophytes.

2. Roots are adventitious in pteridophytes while they arise from the radicle (tap root) in gymnosperms

Answer 2

answer:

1. The sporophytic plant body is by and large arborescent in gymnosperms while it is not so in pteridophytes.

2. Roots are adventitious in pteridophytes while they arise from the radicle (tap root) in gymnosperms.

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3. Pteridophytes may be homosporous or heterospoers, while all gymnosperms are heterosporous.

4. Most of the pteridophytes have a preference for cool, moist areas, while gymnosperms generally exhibit xeric characters.

5. Branching of the stem is dichotomous in pteridophytes while it is lateral in gymnosperms.

6. Heterospory has never resulted in dioeciousness in the sporophyte in pteridophytes, while it is so in many gymnosperms.

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7. Generally secondary growth is absent in pteridophytes, while it is present in gymnosperms.

8. In pteridophytes both microspores and megaspores are released from their respective sporangia, whereas in gymnosperms, megaspore is permanently retained.

9. There is pollination in gymnosperms, while it is absent in pteridophytes.

10. Siphonogamous fertilization (pollen tube development) is seen in only gym­nosperms.

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11. Male gametes are ciliate in pteridophytes, while they are not in gymnosperms (except for few like cycas).

12. Gymnosperms are seed plants (spermatophytes), while there is no seed in pteridophytes.