In a mutational event,when adenine is replaced by guanine,it is the case of

There are three lumps of a given radioactive substance. Their activity is in the ratio of $1 : 2 : 3$ now. What will be the ratio of their activities at any further date?

Two circular coils can be arranged in any of the three situations shown in the figure. Their mutual inductance will be:

The ratio of the de-Broglie wavelength of an $\alpha$-particle to that of a proton,when both are subjected to the same magnetic field such that the radii of their paths are equal,assuming the magnetic field induction vector $\overrightarrow{B}$ is perpendicular to the velocity vectors of both particles,is:

Which of the following are fused in somatic hybridization involving two varieties of plants?

During embryonic development,the establishment of polarity along anterior/posterior,dorsal/ventral,or medial/lateral axis is called: