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.
The ozone hole in September, 2003. Even as scientists verified that the rate of ozone depletion was
Each experimental organism used in cell biology has advantages for certain types
Some scientists believed that langur infanticide was influenced by human disturbance.
Biological control pits one organism against another
Broadleaf Forests on the world map