Perhaps the most concrete piece of evidence for evolution is DNA
Comparison. While Bio-Geography looks at the spreading of species due to the
continental drift it relates mostly to environments and seems to actually rely
on evolution for evidence. Comparative Embryology also has issues due to the fact that it
seems to draw too quickly to the conclusion of evolution without sufficient
evidence. Although Comparative Anatomy was the first piece of evidence for
evolution, it relies on the right conditions to form the fossil which is highly
unlikely. Studies of chromosomes and comparison of DNA sequences draw definite
similarities and differences between species of animals over time. DNA comparison
is the most efficient and accurate therefore providing specific hard evidence
for evolution.