All multicellular organisms use cell division for growth and the maintenance and repair of cells and tissues.
A dietitian because a nutritionist will tell you if you are eating the right portions of food but a dietitian will tell you if you are eating the right food.
Our genes can be affected by the environment and change the way our traits are displayed, called the phenotype. However, changes in phenotype have an underlying genotypic source. Epigenetics or epigenetic changes are changes in the way traits are expressed as an effect of the environment (i.e. food we ate, chemicals in the body, environmental stresses), without changes in the DNA. Simply put, in epigenetics, some parts of the DNA are turned on or off in response to environmental conditions.
3rd Choice. It describes a processed known as crossing over which results in genetically distinct daughter cells.
