Fill in the following blanks with suitable words :

(a) Pollen grains contain ................ gametes of a plant.

(b) Ovules contain ................ gametes of a plant.

(c) The ovary of a flower becomes ................ after fertilisation.

(d) The ovule becomes a .......... after fertilisation.

(e) Flowering plants reproduce by.................method of reproduction.

(f) The female organ of reproduction in the flower is the ...................

(g) The male organ of reproduction in the flower is the .................... .

(h) The name of the structure in the flower in which the male gamete is formed is ............

(i) The ................ at the base of the carpel contains egg cells.

(j) The term used to refer to the transfer of pollen from the stamen of one flower to the carpel of another flower of the same species is ................

(k) The cells involved in sexual reproduction are called ................

(l) Fusion of gametes gives rise to a single cell called ................

(m) The process of fusion of gametes is called ................

(n) A multicellular animal starts its life from a ................ through sexual reproduction.

(o) The union of a sperm nucleus with an egg nucleus is known as .................... and results in a ..................egg.

(p) The menstrual cycle is controlled by.....