The gradual evolution for the family Equidae (horse family) has been well documented within the fossil record.
Answer:
Organisms can be classified into one of three domains based on differences in the sequences of nucleotides in the cell's ribosomal RNAs (rRNA), the cell's membrane lipid structure, and its sensitivity to antibiotics. The three domains are the Archaea, the Bacteria, and the Eukarya.
The plant with the root system is called the rootstock And the portion of the plant with the buds is called the scion