No, spores are not multicellular; they are unicellular.
According to the provided reference, a key distinction between spores and seeds lies in their cellular structure.
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Spores: These are unicellular structures, representing the first cell of a gametophyte.
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Seeds: Seeds, in contrast, contain a multicellular developing embryo, which is the sporophyte of the next generation. This embryo arises from the fusion of male and female gametes.
| Feature | Spore | Seed |
|---|---|---|
| Cellularity | Unicellular | Multicellular |
| Content | Gametophyte | Developing embryo |
