$A$ bacterial cell divides every minute. It takes one hour to fill up a cup. How much time will it take to fill half the cup?

The process that preserves genetic information from generation to generation is $P$.
The process that introduces variations in traits is $Q$.
Select the correct option for $P$ and $Q$.
$\quad\quad\quad P\quad\quad Q$

Assertion $A$: No organism is immortal.
Reason $R$: Death is a mysterious phenomenon.
Which option is correct for Assertion $A$ and Reason $R$?

Which organism does not have heterogametes?

Differentiate between asexual reproduction and sexual reproduction.

$Statement\; 1$: $A$ plant can be retained and multiplied indefinitely without any change or variation through asexual reproduction.
$Statement\; 2$: Asexual reproduction does not involve meiosis and syngamy.