11.In ................... flowers, the thalamus grows upwards completely enclosing the ovary, and the stamens, petals and sepals are borne above the ovary.
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12.In Calotropis, all the microspores of anther lobe remain united to form
13.Albuminous seeds store reserve food materials in ....................
Endosperm
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14.Transfer of pollen grains from the anther to the stigma of another flower of same plant is called..............................
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15.The...................direct the growth of pollen tube towards egg apparatus by secreting some chemical substances.
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16.A kind of reproduction in which the new individuals are formed without involvement of meiosis and syngamy.
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17.A kind of self-pollination in which the pollens from the anthers of one flower are transferred to the stigma of another flower borne on the same plant.
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18.Give the term for cross-pollination by wind.
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19.The nutritive layer of anther wall which provides nourishment to the developing microspores.
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20.The process of the formation of microspores from microspore mother cells.
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