nitrogen-14 . . . carbon-14

carbon-14 . . . carbon-13

uranium-237 . . . lead-207

uranium-237 . . . uranium-236

hydrogen-1 . . . hydride

Sponges

Algae

Arthropods

Mammals

Offspring could inherit acquired traits from parents

Genetic drift has no impact on populations traits

Closely-related individuals will share similar genetic material

Natural selection was the driving force of evolution

No. The half-life of carbon-14 is too short to accurately date an artifact that is older than around 50,000 years, while dinosaurs lived approximately 65 million years ago.

No. Carbon-14 dating has been shown to be unreliable since the rate of decay is not constant in the environment.

Yes. Since the fossils come from an organic source, the research team can measure the remaining carbon-14 to date the fossil.

Yes. Since the fossil is encased in rock, the carbon-14 method can be used on the rocks to determine when the fossil was buried.

No. Dinosaur fossils contain only the carbon-13 form of the element, not carbon-14.

Each of these are examples of information biologists can gather from studying coprolites.

They can be studied to determine what sorts of plants or animals lived in the same time period.

They can be studied to determine an extinct animal's size.

They can be studied to determine what an extinct animal's diet consisted of.

None of these; as coprolites are not a part of the actual animal, they hold very little research value.

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