The cell nucleus contains the majority of the cell's genetic material in the form of multiple linear DNA molecules organized into structures called chromosomes.Each human cell contains roughly two meters of DNA.he cell nucleus contains the majority of the cell's genetic material in the form of multiple linear DNA molecules organized into structures called chromosomes.
After humans, the nature's relatively largest brain is that of the dolphin: 2 kg. A dolphin weighing 120 kg (280 pounds) has a 1.7 kg (4 pounds) brain; compared to its size, this is almost thrice than a chimp.
Brain Tour. The first stop on the virtual brain tour takes a look at the three main parts of the brain, the cerebral cortex, the cerebellum and the brain stem. It also explores the four brain lobes: the frontal lobe, the parietal lobe, the temporal lobe and the occipital lobe. The first part of the brain to evolve some 500 million years ago was the brain stem. It is also known as the reptilian brain or lower brain.