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.
Chapter 1 takes you on a guided tour of the major organelles in the cell, including the nucleus, endoplasmic reticulum, Golgi complex, lysosomes and mitochondria. Chapter 1 takes you on a guided tour of the major organelles in the cell, including the nucleus, endoplasmic reticulum, Golgi complex, lysosomes and mitochondria.