A parasite could determine the size of the population. Whether it grows or shrinks. It could also change genetics
Species is the correct answers!!!
Answer: The primary function of leaves is to collect sunlight, for use in photosynthesis.
Hope this helped!!
A cold front does count as weather, if you're looking for more info on cold fronts and warm fronts visit the site below.
http://www.weatherquestions.com/What_are_fronts.htm
