The genetic code is carried out by the Deoxyribonucleus acid DNA molecule in most organisms. Most of the viruses have RNA as their genetic material which codes genetic information.
An ectotherm gets its heat from external sources
(Remember "ecto" means outer, "endo" means inner)
A change in their food, from trees to grass in the Great Plains.
Mitosis is cell division in to daughter cells with the same chromosome number as the parent cell
