A scientist argues that genes that code for small size in cows become less common over time due to selective breeding. Predict how you could use the data to support this argument.

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?