Progeny resulting from cross pollination are

Nitsch was able to obtain strawberries of curious shapes by:

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.

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

Identify the correct ratio of male gametes,vegetative cells,generative cells and microspore mother cells produced in a microsporangium if $80$ pollen grains are released from it.