Question

multiple choice question
in a pine, the sporophyte generation begins when _.
o the contents of the pollen tube are released
o the pollen tube enters the ovule
o a zygote forms
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Explanation:

In plants like pines, the sporophyte generation starts when a zygote is formed through fertilization. The pollen - tube related events are steps leading up to fertilization but the actual start of the sporophyte generation is the formation of the zygote, which is a diploid cell formed by the fusion of a sperm and an egg.

Answer:

a zygote forms