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.
In addition to the nucleus, eukaryotic cells may contain several other types of organelles, which may include mitochondria, chloroplasts, the endoplasmic reticulum, the Golgi apparatus, and lysosomes.Each of these organelles performs a specific function critical to the cell's survival.ecall that DNA contains the information required to build cellular proteins. In eukaryotic cells, the membrane that surrounds the nucleus â commonly called the nuclear envelope â partitions this DNA from the cell's protein synthesis machinery, which is located in the cytoplasm.