In the ovule each megaspore mother cell undergoes _____ to produce four megaspores.

Question

BlackTom AI · Accepted Answer

Question restatement: In the ovule, the megaspore mother cell undergoes _____ to produce four megaspores.

Option 1: meiosis. This is the correct process here. The megaspore mother cell (the diploid cell) divides by meiosis to produce four haploid megaspores, typically with three of them degenerating and one becoming the functional megaspore. This aligns with the standard pattern of megasporogenesis in flowering plants.

Option 2: mitosis. If the megaspore mother cell underwent mitosis, you would generate more diploid or haploid cells without the genetic reduction that meiosis provides. However, megasporogenesis requires reduction division to produce haploid megaspores, so mitosis is inappropriate here.

Option 3: germination. Germination refers to the growth of a seed embryo into a seedling, or the sprouting of a pollen grain or spore in some contexts, not to the division of the megaspore mother cell. This meaning is unrelated to megasporogenesis.

Option 4: fertilization. Fertilization is the fusion of gametes to form a zygote and occurs after pollination, not during the formation of megaspores. It does not describe the division of the megaspore mother cell.

Summary: Among the given options, meiosis uniquely accounts for the reductional division that yields four haploid megaspores from the diploid megaspore mother cell, which is the core concept of megasporogenesis in plant ovules. The other terms describe processes unrelated or incorrectly related to the formation of megaspores.

In the ovule each megaspore mother cell undergoes _____ to produce four megaspores.单项选择题

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