Sun Powered bicycle path glows in the dark in Poland

Bone glow in the dark. This is due to

You discovered a novel eukaryotic organism that glows in the dark. You believe this trait is due to a single gene, and you wish to clone the gene. Which of the following strategies is most likely to be successful ?

The mean free path of electrons in the gas in a discharge tube is inversely proportional to the pressure inside it. The Crookes dark space occupies half the length of the discharge tube when the pressure is 0.02 mm of mercury. Estimate the pressure at which the dark space will fill the whole tube.

Assertion : A piece of red glass is heated till it glows in dark. The colour of glowing glass would be orange. Reason : Red and orange is complementary colours.

Bones glow in dark. This is due to

Chemiluminescence is a phenomenon in which on element glows in dark when exposed to moisture. Which element of 15^(th) group shows this phenomenon ?

The movement of sunflower in accordance with the path of the sun is due to :

The path of CO_(2) in the dark reaction of photosynthetic was successfully traced by the use of the following or The dark reaction is traced by