Plants, animals and other living organisms that exist on Earth have different structures and characteristics (physically and internally). The variety of body plans and structures, anatomical and behavioral differences are due to each one's structures of the DNA molecule.
For instance, DNA molecules which are long chains connecting
just four kinds of smaller molecules, whose precise pattern encodes
genetic information. The closeness or remoteness of the relationship
between organisms can be deduced from the extent to which their DNA
sequences are alike. The
The connection of organisms derived from
likeness in their molecular structure closely matches the classification
based on anatomical similarities.
