25. Figure 3 illustrates the life cycle of a fern, in which four unicellular stages are labeled ①-④. Assuming the haploid chromosome number (n) = 34, which of the following statements are true? (select all that apply.)
(A) Cell ① is derived from a spore mother cell through meiosis. Each spore mother cell produces 64 spores in leptosporangiate ferns.
(B) Cell ② is produced by mitosis in a female or hermaphroditic gametophyte.
(C) Cell ② has 17 chromosomes in its nucleus.
(D) Cell ③ is the male gamete of the fern.
(E) Cell ④ is expected to be homozygous across the genome.

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