The process that developed earth core and crust is called planetary differentiation
The cell theory teaches that all living things are composed of one or more cells; the cell is the basic unit of life.
Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.
