Multiple Choice
In which geological period would you find the earliest fossils of vascular plants?
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24. History of Life on Earth
The Fossil Record
Multiple Choice
How do fossils of limb structures provide evidence that ancient and modern tetrapods are related?
A
They reveal that ancient tetrapods had completely different limb structures compared to modern tetrapods.
B
They demonstrate that ancient tetrapods were exclusively aquatic, unlike modern tetrapods.
C
They indicate that ancient tetrapods had more limbs than modern tetrapods.
D
They show similar bone arrangements in the limbs of both ancient and modern tetrapods.
Verified step by step guidance1
Understand the concept of tetrapods: Tetrapods are vertebrates with four limbs, including amphibians, reptiles, birds, and mammals. They evolved from fish-like ancestors.
Explore the fossil evidence: Fossils of ancient tetrapods provide physical evidence of limb structures that can be compared to those of modern tetrapods.
Examine limb structure similarities: Fossils show that both ancient and modern tetrapods have similar bone arrangements in their limbs, such as the humerus, radius, and ulna in the forelimbs.
Consider evolutionary significance: The similarity in limb structures suggests a common ancestry, indicating that modern tetrapods evolved from ancient tetrapods.
Reflect on evolutionary adaptation: While the basic limb structure remains similar, adaptations have occurred over time to suit different environments, supporting the idea of evolutionary change from ancient to modern tetrapods.
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