Which of the following is $NOT$ included in in-situ conservation?

Removal of shoot tips is a very useful technique to boost the production of tea-leaves. This is because

When a big drop of water is formed from $n$ small drops of water,the energy loss is $3E$,where $E$ is the energy of the bigger drop. If $R$ is the radius of the bigger drop and $r$ is the radius of the smaller drop,then the number of smaller drops $(n)$ is:

What is the condition called when the heart rate decreases below the normal range?

The resultant capacitance between $A$ and $B$ in the figure is.....$\mu F$

With a standard rectangular bar magnet,the time period of a vibration magnetometer is $4 ~s$. The bar magnet is cut parallel to its length into four equal pieces. The time period of the vibration magnetometer when one piece is used (in seconds) (bar magnet breadth is small) is