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Cleistogamy: Pansy
Polar Nuclei: Endosperm
Bougainvillaea: Bracts
Origin of ovules: Placenta
Helping cells: Synergids
Explanation:
Cleistogamy: Is is the phenomenon by which plants undergo self-pollination. This occurs due to the non-opening of the flowers.
The endosperm is a triploid (3n) structure. This acts as a food reserve for the growing embryo.
Bougainvillaea has bracts around the flowers. Bracts are a type of leaf modification.
The placenta in plants is the part of the carpel through which the ovules are attached.
Synergids are the cells, that protect the egg cell and helps in guiding of the pollen tube by the synthesis of certain chemokines.
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