Which of the following parts of a neuron is covered by a fatty sheath?

The value of electric potential at any point due to an electric dipole is

Ecdysone is produced by

During the depression in freezing point experiment,an equilibrium is established between the molecules of

In a Young's double slit experiment,$12$ fringes are observed to be formed in a certain segment of the screen,when light of wavelength $600 \, nm$ is used. If the wavelength of light is changed to $400 \, nm$,the number of fringes observed in the same segment of the screen will be

The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are categorised as