Can you help me answer this question

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In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that