The DNA in plants and animals is composed of the same chemical components - HSC - SSCE Biology - Question 1 - 2011 - Paper 1

The biological significance of the fact that DNA in plants and animals is composed of the same chemical components lies in the shared common ancestry of all living organisms. This implies that both plants and animals evolved from a common ancestor, which is a foundational principle in evolutionary biology. The similarity in DNA supports the idea that diverse organisms can develop from similar genetic materials, thereby highlighting the interconnectedness of life on Earth.