Suppose in 2015 a population of 500 squirrels lived in a chaparral region of Southern California. If every year 55 squirrels were born and 32 squirrels died. Calculate the population growth per year. Do not include units.

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.

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When the sun hits the plant and the plant has water