The Latin name is from the Japanese name for T. sieboldii. T. canadensis and T. heterophylla were discovered early (before 1800) and until 1855 were simply treated as species of Pinus, but in 1842 T. sieboldii, the southern Japanese hemlock, was described as Abies tsugae.
The brains of the cell, the nucleus directs cell activities and contains genetic material called chromosomes made of DNA.
The cell nucleus is an organelle that functions as command-central, so to speak. The nucleus contains the genetic code material, in the form of DNA, that coordinates the growth and functioning of the rest of the cell.An organelle that works very closely with the nucleus is the ribosome.he cell nucleus is an organelle that functions as command-central, so to speak. The nucleus contains the genetic code material, in the form of DNA, that coordinates the growth and functioning of the rest of the cell.