1 When deep sea animals look up toward the oceanâs surface, they see other animals overhead as dark shapes against a lighter background. 2  But by lighting two rows of photophores on its underside, this deep sea fish avoids casting its shadow on predators belowââand can virtually disappear.
The genetic material is contained in chromosomes which are within the nucleus of the cell. Yes. The genetic material is contained in chromosomes which are within the nucleus of the cell.
The atomic nucleus makes up most of the atom's mass. The nucleus contains the Protons and Neutrons and make up 99.999% of the mass of an atom.