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How does fossil evidence help determine the evolutionary relationships between whale ancestors and their descendants?
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24. History of Life on Earth
The Fossil Record
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Which of the following can be learned about a species from studying their fossilized skeletons?
A
The general body structure and possible mode of locomotion
B
The precise color of the organism's skin or feathers
C
The exact DNA sequence of the species
D
The specific diet of every individual in the population
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Examine the fossilized skeleton to determine the general body structure, such as the arrangement of bones, size, and shape. This provides insights into the physical characteristics of the species.
Analyze the skeletal features, such as limb structure, joint articulation, and bone density, to infer the possible mode of locomotion (e.g., walking, swimming, flying).
Understand that fossilized skeletons do not preserve soft tissues like skin or feathers, so the precise color of the organism cannot be determined from the skeleton alone.
Recognize that DNA is not typically preserved in fossilized skeletons, so the exact DNA sequence of the species cannot be learned from fossils.
Consider that while certain skeletal features (e.g., teeth or jaw structure) may provide clues about the species' diet, it is not possible to determine the specific diet of every individual in the population from fossilized skeletons.
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