1. In gymnosperms, which is the dominant plant form in their life cycle? 2. In b
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Question
1. In gymnosperms, which is the dominant plant form in their life cycle? 2. In bryophytes, which is the dominant plant form in their life cycle? 3. What is the bryophyte female organ of reproduction? 4. What is the bryophyte male organ of reproduction? 5. In ferns, which plant form (stage) is diploid? 6. In ferns, which plant form (stage) is haploid? 7. In making gametes, what type of cell division (mitosis/meiosis) does a gametophyte use? reswhaoropbyte ue? 9. Are members of coniferophyta vascular or avascular?Explanation / Answer
1. Gymnosperms are sporophyte-dominant. This means that they spend most of their life cycle with diploid cells and the gametophyte is short lived. This is similar for all vascular plants.
2. Bryophytes are gametophyte-dominant. This means that the haploid gametophyte is the longer lived plant form.
3. The female organ of reproduction in bryophytes is archegonia. The egg cells are present in the archegonium.
4. The male organ of reproduction in bryophytes is the antheridia. Antheridia produces antherozoids or sperms.
5. In ferns, the sporophyte phase is diploid. It is the typical fern plant.
6. In ferns, the gametophyte phase is haploid. Typically, it consists of a photosynthetic prothallus.
7. Since both the gametophyte and gametes are haploid, gametophytes produce gametes by mitosis.
8. The sporophyte is diploid and the spores are haploid. So, the sporophytes produce spores by meiosis.
9. Members of coniferophyta are vascular.
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