Identify the organism shown in the given figure.

Olfactoreceptors are:

The coordination number of a metal crystallizing in a hexagonal close-packed structure is

Two blocks of $7 \ kg$ and $5 \ kg$ are connected by a heavy rope of mass $4 \ kg$. An upward force of $200 \ N$ is applied as shown in the diagram. The tension at the top end of the heavy rope at point $P$ is: $(g = 10 \ m/s^2)$ (in $N$)

In a co-axial,straight cable,the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero:

In Bohr's model of hydrogen-like species,which of the following is true?