What has the biggest impact on a region,weather or atmosphere.

Weather.

You see how the weather is in a certain place can determine how the plant life and just life in general would live. It can also effect people. Let's say there was a drought somewhere, this would effect people whereas, they could lose a significant source of water and food because it would make them likely have to find a new water source or the animals would. Weather also effects the land in harmful ways. For example when it floods, the ground gets muddy but can also get so muddy below a certain area, that the soil entirely collapses into the ground (that would be a sinkhole).

There are picture below to show you some of the effects.

-R3TR0 Z3R0

Heredity

Explanation:

The passage of these instructions from one generation to the next generation is known as heredity. In heredity, the parent DNA is replicated and copied over to  the offspring DNA. This happens during the replication process. In fact, to be more precise, the process takes place during chromosomal division. This is when half of the parent DNA strand is passed over to the offspring cells. Thus, the offspring carries half the instructions from the parents.