Infection of pneumonia occurs due to

The first transgenic plant was tobacco. It contains a resistance gene against which of the following?

In $YDSE$,the separation between the slits is halved and the distance between the slit and the screen is doubled. The fringe width is

Among the following,which is water insoluble?

The structure of a mixed oxide is cubic close packed $(ccp)$. The cubic unit cell of the mixed oxide is composed of oxide ions. One-fourth of the tetrahedral voids are occupied by divalent metal $A$,and the octahedral voids are occupied by a monovalent metal $B$. The formula of the oxide is:

$A$ conducting rod $AC$ of length $4l$ is rotated about a point $O$ in a uniform magnetic field $\vec B$ directed into the paper. $AO = l$ and $OC = 3l$. Then: