US National Weather Service Philadelphia September Weather data records that on September 28, 1984, the high temperature did not exceed 52 degrees Fahrenheit, the lowest high measured in Philadelphia in the past 69 years.
Vacuoles are generally used to store cell products or protect the rest of the cell from invading microorganisms. The large central vacuole of plant cells is a special case. It is used to store water and cellular wastes and helps maintain the necessary internal pressure of plants called turgor pressure. Structure.
In plants this pressure is called turgor pressure, or the pressure that pushes the cell membrane against the plasma wall to maintain the cellâs shape. Turgor pressure is effected by osmotic pressure, or the pressure differentials that cause osmosis to occur.