The correct sequence of increasing covalent character is represented by

The study of homologous structures in mature organisms provides evidence for evolutionary relationships among certain groups of organisms. Which field of study includes this evidence of evolution?

Which of the following animals is not viviparous?

If $S$ and $S^{\prime}$ are the foci of an ellipse,$B$ is one end of the minor axis and $\angle S B S^{\prime} = 90^{\circ}$,then the eccentricity of that ellipse is

What product is obtained when ethyl hydrogen sulphate is heated with an excess of alcohol at $410 \, K$?

If the charge on a body is increased by $2 \ C$,the energy stored in it increases by $21 \%$. The original charge on the body in coulomb is