Yes in each ecosystem there's different weather conditions. That's why there's only certain animals in certain areas of the would. It happens with things as small as germs to ad big as elephants. Hope I helped! :)
-
Well Yes it affect the mood and mental stability. You can read up more on this by visiting: http://voices.yahoo.com/can-current-weather-conditions-affect-mood-5226311.html
-
Skin color is a good example. In humans, the closer to the equator, the darker the skin, since darker skin provides protection from the sun. It's a slow process that happens over thousands of years.