Events in the diagram are (in sequential order)

Study the following statements and select the correct option:
$(i)$ Tapetum nourishes the developing pollen grains.
$(ii)$ Hilum represents the junction between the ovule and the funicle.
$(iii)$ In aquatic plants such as Water hyacinth and Water lily,pollination occurs by water.
$(iv)$ The primary endosperm nucleus is haploid.

Which of the following flowers only once in its life-time?

Which of the following represents the correct sequence of phases in the life cycle of wheat? [where $J$ - Juvenile phase,$R$ - Reproductive phase,$I$ - Interflowering period,$G$ - Gap phase,$S$ - Senescence,$V$ - Vegetative phase]

Give differences: Male gametophytic stage and Female gametophytic stage.

Branched type of pollen tube is formed in