The life history of kelp consists of a very large sporophyte and a tiny gametophyte. Sea lettuce and some other…

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The life history of kelp consists of a very large sporophyte and a tiny gametophyte. Sea lettuce and some other seaweeds, however, have a gametophyte that is as big as their sporophyte. Do you see any advantages for kelps having such an inconspicuous gametophyte? What are the advantages of having a large gametophyte?