The skull of a frog is:

Viruses are distinct from other living cells because -

Which of the following has the maximum nucleophilicity?

The ends of an element of zinc wire are kept at a small temperature difference $\Delta T$ and a small current $I$ is passed through the wire. Then,the heat developed per unit time

The conjugate acid of $NH_2^-$ is

The taxonomic unit $phylum$ in the classification of animals is equivalent to which hierarchical level in the classification of plants?