Which statement is most accurate about alternation of generations? It refers to alternating grandchildren and grandparent generations. It involves alternating haploid and diploid phases. It refers to the processes of meiosis and fertilization. It involves only some of the seedless vascular plants.

Basically, when we say alternation of generations, this refers to the life cycle of other Eukaryotes, particularly plants. What happens is that the alternation happens in between their haploid and diploid stages. Therefore, the statement that accurately describes what this means is the second option. Hope this answers your question.