Who patented the three-position traffic signal in

The joint where the neck joins the head is known as which of the following?

Proteins are assembled from how many amino acids?

Which of the following G-protein takes part in the regulation of vision?

The refractive index of glass is 1.5. What is the speed of light in glass? Speed of light in vacuum is 3.0 x 10⁸ m/s.

Which of the following is a chemical change?

What is the reason for twinkling of stars?

Respiration in the absence of air is called

An object of mass 2 kg is lifted vertically through a distance of 1.5 m. The work done in process is

The anther contains

Which of the following diseases can NOT be spread through air?