What is the cause of genetic erosion?

The value of $x$ for the maximum value of $\sqrt{3} \cos x + \sin x$ is .....$^o$

Two wires $A$ and $B$ are of lengths $40 \ cm$ and $30 \ cm$. $A$ is bent into a circle of radius $r$ and $B$ into an arc of radius $r$. $A$ current $i_1$ is passed through $A$ and $i_2$ through $B$. To have the same magnetic inductions at the centre,the ratio of $i_1: i_2$ is

The simplest and most primitive embryophytes are ......

Which one of the following does not correctly represent the order of the property indicated against it?

The equivalent mass of an element is $4$. Its chloride has a vapor density of $59.25$. What is the valency of the element?