Gymnosperms do not have :-a)Ovuleb)Antheridiumc)Archegoniumd)EggCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Explanation:

Gymnosperms and their Reproductive Structures:

Gymnosperms are a group of seed-producing plants that include conifers, cycads, Ginkgo, and gnetophytes. They have reproductive structures that are different from angiosperms (flowering plants).

Reproductive Structures of Gymnosperms:

1. Ovule: Gymnosperms do have ovules, which are the structures that contain the female gametophyte and eventually develop into seeds after fertilization.

2. Antheridium: Gymnosperms do not have antheridia, which are the structures in plants that produce male gametes (sperm). Instead, gymnosperms produce male gametes in pollen grains.

3. Archegonium: Gymnosperms do have archegonia, which are the structures that produce the female gametes (eggs) and are involved in fertilization.

4. Egg: Gymnosperms do have eggs, which are the female gametes produced in the archegonium and are fertilized by male gametes from pollen grains.

Conclusion:

In summary, gymnosperms do not have antheridia, which are the structures that produce male gametes. Instead, they produce male gametes in pollen grains, making their reproductive structures unique compared to other plants.

Answer

Gymnosperms are flowerless plants that produce cones and seeds. The term gymnosperm literally means 'naked seed,' as gymnosperm seeds are not encased within an ovary. ... Unlike angiosperms, gymnosperms do not produce flowers or fruit.

Answer

Gymnosperms do not have:
- Antheridium: Antheridium is the male reproductive structure found in bryophytes and pteridophytes, but not in gymnosperms. Gymnosperms have male cones that produce pollen grains.
- Archegonium: Archegonium is the female reproductive structure found in bryophytes and pteridophytes, but not in gymnosperms. Gymnosperms have female cones that contain ovules.
- Ovule: Ovules are the structures that contain the female gametophyte and eventually develop into seeds after fertilization. Gymnosperms have ovules that are exposed on the surface of the cones, unlike angiosperms where ovules are enclosed within the ovary.
- Egg: Eggs are the female gametes that are fertilized by the male gametes to form a zygote. Gymnosperms have eggs, but they are not produced within archegonia like in bryophytes and pteridophytes.
In summary, gymnosperms lack antheridia, archegonia, and enclosed ovules, although they do have eggs.

Answer

Gymnosperm any type of vascular plant that reproduce  via an exposed seed . They do not covers of there seed

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