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13 cards from this deck
Four
4 haploid pollen grains (tetrad)
Generative nucleus & tube nucleus
4 haploid cells
3 die (degenerate), 1 becomes embryo sac
5 degenerate, 2 polar nuclei, 1 egg cell
Transfer of pollen from anther to stigma (same species)
Union of male & female gametes to form diploid zygote
Sperm nucleus (n) + egg (n) = zygote (2n)
Sperm (n) + 2 polar nuclei (n) = endosperm (3n)
Water, oxygen, suitable temperature
Grows down (geotropism)
Falls (respiration), then increases (photosynthesis)
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