After pollination, which of the following events is crucial for fertilization?

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After pollination, a pollen tube must grow from the stigma to the ovule in order for fertilization to occur. The pollen tube contains the male gametes (sperm) which will then fertilize the egg and the polar nuclei within the ovule, leading to the formation of the zygote and endosperm. The other choices, such as petal closure and insect pollination, are important for successful pollination but are not essential for fertilization to occur.

After Pollination, Which of the Following Events Is Crucial for Fertilization