Questions

The first talkie film in India was Ardeshir Irani released Alam Ara, on 14 March 1931.

Irani later produced the first south Indian talkie film Kalidas directed by H.M. Reddy released on 31 October 1931.

The troposphere is the lowest layer of the Earth's atmosphere. The air is very well mixed and the temperature decreases with altitude. Air in the troposphere is heated from the ground up. The surface of the Earth absorbs energy and heats up faster than the air does.

At any given speed, momentum is directly proportional to mass of an object.

A chromatid is one copy of a newly copied chromosome which is still joined to the original chromosome by a single centromere.

The two identical copies—each forming one half of the replicated chromosome are called chromatids.

Chromonema is the fibre-like structure in prophase in the primary stage of DNA condensation. In metaphase, they are called chromatids.

The best example for somatic mutation would be cancer, familial cancer (which transmits through gametes to the next generation) are not so common while sporadic cancer is seen the most where body cells of a particular area goes through mutations for a number of years and becomes cancerous, but it is not transmitted to next generation.

Here 6CO2 + 6H2O -----> C6H12O6 + 6O2 is the only option which best summarizes photosynthesis. We know that, photosynthesis is the reverse of cellular respiration in that carbon dioxide is used with water to form sugar, and oxygen is released.