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.
âOrganellesâ is the general name for the various structures inside the cytoplasm. Each. type of organelle has a specific function. The nucleus is the control centre and source of genetic information for. the cell. By using the the genetic information, proteins can be. produced which controls the cellâs functioning. The nucleus is almost. always near the centre of the cell. Chromatids are long sequences of genetic information in the form of.