Question

Selaginella does not produce seed but spermopsida produce when both are heterosporous, why?

Answer 1

Answer:

Selaginella does not produce seed but spermopsida produce when both are heterosporous, Because Selaginella has both microspores and megaspores, the plant is called heterosporous. Selaginella does not produce seeds because they are non- flower plant and are reproduced using spores. Spermopsida are mainly gymnosperms or angiosperms.

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Answer 2

Answer:

The subject of seed production does not apply to Selaginella because it is a heterosporous primitive pteridophyte. Angiosperms alone are known for having true seeds. Although Sellaginella is a pteridophyte, it doesn't produce fruit. Seed will only be produced by fruits.

Explanation:

Cryptograms include Selaginella, which are spore-bearing plants. The result is strobilus. Although they don't produce seeds, they have a propensity to do so. The endosporic polarity of the embryo plays a vital role in the development of the seed evolution. An endoscopic polarity is related to the existence of suspensor. Selaginella exhibits the primitive trait of archegonium development.

Unlike seed-bearing plants, selaginella does not exhibit an open kind of development and organogenesis.

When only one spore of the tetrad develops without a seed coat or resting period, the retention of the spore within the sporangium during gametophyte development, fertilization, and embryo production supports seed structure.

Marsileaceae and Salviniaceae, is called heterospory. …all species of Selaginella are heterosporous; that is, they produce spores of two sizes, the larger designated as megaspores and the smaller as microspores. The megaspores develop into female gametophytes and the microspores into male gametophytes.

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