Questions

Gene flow means migration of genes from one to another. This gene flow is caused by individuals moving into population.

Genetic drift or allelic drift is the change in the relative frequency in which a gene variant (allele) occurs in a population due to random sampling and chance.

When is genetic drift a major factor in evolution is

* When there is low gene flow.

* When there is no selective pressure.

* When there is a bottleneck.

Microprocessor contain ROM chip beacause it contain instructions to execute data. It contain the monitor program which not only include execution instruction but also interfacing program

Sound is a mechanical vibration and needs a medium for propagation. The higher the density of the medium, the faster the sound travels. So, sound cannot travel through vacuum.

As the sound travels faster in solids than liquids and gases, sound travels faster in the glass than Air and water.

As there is no atmosphere surrounding the moon, the second from any band that is played there cannot travel outwards there is no material medium surrounding if for its propagation.