What is a specific part of a cell that preforming a specific task

Based on the results of this study, what questions remain unanswered? how can these questions guide future research

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

Explain how fossils scientists make discoveries about the lives of organisms and about how environments have changed over time. plz hurry up it time