Plant group in which every cell of gametangium forms gametes is

Plant group with largest ovule, largest tree and largest gametes is

Plant group with largest ovule, largest tree, and largest gamets:

Plant group with largest ovule , largest tree , and largest gametes is

What is the name os the cells capable of making gametes? What is the ploidy of these gamete forming cells?

What is the first cells formed after the union of male gametes will egg ?

In which type of fusion, the organisms do not form gametes but they themselves behave as gametes?

In which group of plants there is involvement of tube for movement of male gamete ? Justify this.

In which group of plants there is involvement of tube for movement of male gamete ? Justify this.

Chromosome number in endosperm cell of plant 'x' and the gamete of plant 'y' are equal. Plants 'x' and 'y' respectively are