Select the correct option with respect to the chromosome number in the sexual life cycle of an apple $(2n = 34)$.

Which one of the following chemicals induces polyploidy in plant cells?

Select the option that represents the correct sequence of events in the process of fertilization in flowering plants:
$(I)$ Movement of male gametes towards the egg cell and central cell
$(II)$ Formation of pollen tube
$(III)$ Dehiscence of anther
$(IV)$ Germination of pollen grain
$(V)$ Fusion of nuclei (Syngamy and Triple Fusion)
$(VI)$ Entry of male gametes into the synergid
$(VII)$ Deposition of compatible pollen on the stigma

The chromosomal number in a cell of a flowering plant is:

Discuss with your teacher about:
$(i)$ haploid insects and lower plants where cell-division occurs,and
$(ii)$ some haploid cells in higher plants where cell-division does not occur.

Which plant loses its economic utility if its fruits are produced by induced $..........$?