Bivalents in meiosis are

Choose the correct pair.

Column-$I$	Column-$II$
$1$. Leptotene	$p$. Homologous chromosomes are separated
$2$. Diakinesis	$q$. Nucleolus reappears
$3$. Pachytene	$r$. Chromosomes can be observed in a microscope
$4$. Anaphase-$I$	$s$. Nucleolus disappears
	$t$. Crossing over

In plants,meiosis is observed in .........

If a diploid cell has $20 \text{ pg}$ of $DNA$ after the $S$ phase,what will be the condition in each daughter nucleus after Anaphase-$II$?

The following image shows certain events occurring during a specific stage of cell division. Which stage is this?

$S -$ Statement: Recombination nodules are visible during the diplotene stage.
$R -$ Reason: Synapsis occurs during the zygotene stage.