How is observation used by scientists? O A. To prevent the use of peer review
O B. To make experiments unnecessary
O C. To make experiments less repeatable
O D. To learn new information about the world

What function does a limb serve in each animal how are the limb bones of the four animal similar based on the similarities what can be inferred about the evolution of the poor animals

Which elements are in the substance that makes up about 60% of the male human body

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?