The option D is correct :The gametophytes of seed plants are never exposed to the external environment. Unlike spores, The gametophyte in seed plants is often tiny and is kept in the tissues of the sporophyte. The integument refers to the layers of sporophyte tissue that encircle the megasporangium.
seeds carry food reserves that can be used to support a young plant. While spores are distributed by the wind, seeds can be spread by animals. While spores only live a few days, seeds can slumber for weeks or even years. Seeds contain a supply of food in storage, in contrast to spores. If the conditions are right, seeds that have been transported far from the parent sporophyte may germinate and rely on stored nourishment to develop into seedlings. Spores and seeds vary primarily in that seeds have stored nourishment in their endosperm, which allows them to germinate in adverse conditions whereas spores do not, making them more dependent on good conditions for germination.
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Full Question :
Which of the qualities is a major difference between all spore-dispersing and seed-dispersing plants? select all that apply.
A In seed plants, dispersed spores contain a multicellular gametophyte.
B Seed plants disperse gametes and seeds instead of spores.
C The sporophyte of seed plants is photosynthetically independent.
D The gametophytes of seed plants are never exposed to the external environment.
