Which type of selection is illustrated by these two graphs?
a. Directional
b. Stabilizing
c. Disruptive
d. Natural
After studying the fossils of woolly mammoths and comparing them to the bones of modern-day elephants, Georgia's Cuvier proposed several new ideas about the history of life on earth.
Which general statement can be made about this process of Cuvier?
a. All scientific ideas are made by comparing past and present organisms.
b. Scientists always discover new ideas when they study details about living things
c. Through specific studies, new ideas can be developed
d. Understanding the past is not important to studying the present
How does red radiometric dating help scientists pinpoint the age of a fossil?
a. In the radiometric dating, scientists place samples of a fossil in certain liquids until the samples dissolve. The rate at which they dissolve indicates the age of the fossil
b. Radiometric dating allows scientists to find fossils in only the lowest and oldest layers of sediment
c. In radiometric dating, scientists mix the carbon in a fossil with carbon from similar fossils whose age they know.By comparing the carbon, they can tell the exact age of the fossil
d. Radiometric dating shows the rate of decay of radioactive material present in any object. Scientists can use that data to find the absolute age of the fossil