PH is important so that O nutrients can be properly absorbed into the plant.
flowers will grow
roots will grow deeper into the ground.
O fruit can develop on the plant.

a. to encourage apoptosis

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.