A new organism is discovered in the forests of Costa Rica. Scientists there determine that the polypeptide sequence of hemoglobin from the new organism has 72 amino acid differences from humans, 65 differences from a gibbon, 49 differences from a rat, and 5 differences from a frog. These data suggest that the new organism
A) is more closely related to humans than to frogs.
B) is more closely related to frogs than to humans.
C) evolved at about the same time as frogs, which is much earlier than primates and mammals.
D) is more closely related to humans than to rats.
E) is more closely related to frogs than to humans and also evolved at about the same time as frogs, which is much earlier than primates and mammals.
Barbara McClintock, who discovered transposable elements.
Boreal forests, such as this one in Siberian Russia, are dominated by a few species of conifer trees
Model Organism Neurospora
A recently discovered fossil of a missing evolutionary link is shown on the right, and a ...
In 1964 a team of Russian scientists smashed a neon nucleus into a plutonium tar
A Caecilian amphibian (Dermophis mexicana). Damp forests of Mexico.