What is the process of nuclear division called during which the chromosome number is reduced to half?

Which one of the following is a normal condition of chromosomes in gametes?

$S -$ Statement: In the pachytene substage,each group of chromosomes appears as a bivalent.
$R -$ Reason: During prophase in plant cells,the centriole units arranged at the two poles form spindle fibers.

Which type of cell division is observed in germ cells?

If a leaf cell has $8$ chromosomes,it is most likely that:

Choose the correct sentences.
$1.$ Meiosis is an important process for evolution.
$2.$ In meiosis-$II$,the mother cell is haploid.
$3.$ In anaphase-$II$,homologous chromosomes are separated.
$4.$ After meiosis,each daughter cell has the same $DNA$ strands.