15. Which of the following is the correct order of floral organs from the outside to the inside of a complete flower?
(A) petals → sepals → stamens → carpels
(B) sepals → stamens → petals → carpels
(C) sepals → petals → stamens → carpels
(D) spores → gametes → zygote → embryo
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統計: 尚無統計資料
統計: 尚無統計資料