Final answer:
DNA sequences of organisms provide evidence of evolution and common ancestry, indicating relationships amongst diverse species and supporting evolutionary theory.
Step-by-step explanation:
The DNA sequences of the Texas horned lizard and the Texas bluebonnet can provide evidence that all living organisms, including highly venomous snakes, butterflies, plants, and lizards are related and have evolved from a common ancestor. The similarity in DNA sequences suggests how closely or distantly related different species are to each other. This line of evidence supports the theory of evolution, mapping how life developed from single-celled organisms to the diverse life forms we see today.
Moreover, examples like the similar markings in venomous snakes, which assist in deterring predators such as owls, can be a result of convergent evolution, where unrelated species become more similar because they have adapted to similar environments or ecological niches. Furthermore, the fact that different species, such as the dense blazing star and the purple coneflower share a basic morphology, is indicative of a common ancestral origin despite their variation in appearance.