If a plant bears only staminate flowers, what is it called?

Match the following:

Column-$I$	Column-$II$
$(a)$ Epicotyl	$(v)$ Mango
$(b)$ Hypocotyl	$(w)$ Plumule
$(c)$ Nuclear Endosperm	$(x)$ Coconut water
$(d)$ Parthenocarpic fruits	$(y)$ Banana
	$(z)$ Radicle

Choose the correct sequence for the different stages in the life cycle of rice.

Choose the correct option from the following statements.
$I$. During embryogenesis,the zygote undergoes mitotic cell division.
$II$. In organisms with a diplontic life cycle,the zygote divides by meiotic cell division.
$III$. The pericarp (fruit wall) develops from the ovary wall after fertilization.
$IV$. In brinjal,sepals remain attached to the fruit even after fertilization.

Make the correct pair:

Column-$I$	Column-$II$
$A$. Tapetum	$i$. Degenerate during development
$B$. Intine	$ii$. Resistant organic materials
$C$. Vegetative cell	$iii$. Pollen tube
$D$. Sporopollenin	$iv$. Provide nourishment to pollen grains

How many meiotic divisions are required to produce the pollen grains necessary for the formation of $800$ wheat seeds?