Little sunlight reaches the floor of coniferous forests because

Little sunlight reaches that floor of caniferous forest because trees grow in dense stands. trees in caniferous forests grow close to each other and grow very tall forming canopies with their branches. canopies act like and umbrella that shields the sunlight from reaching on the floor of the forest. as a result insufficient sunlight there is little or no growth of vegetation at the floor of the forest. the areas where caniferous forest are found receive high amount of rainfall and this is what encourages the thick growth of trees.

In my own word cell technology can  lead to advances in the understanding of diseases mechanism and transmission because diseases is very bad

~potters6/te801/biology/biounits/respiration.htm