Multiple Choice
Which of the following statements is FALSE based on the simplified phylogenetic tree shown?
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21. Evolution
Introduction to Evolution and Natural Selection
Multiple Choice
Which of the following could be considered the most recent common ancestor of living tetrapods?
A
Ray-finned fish
B
Lobe-finned fish
C
Jawless fish
D
Cartilaginous fish
Verified step by step guidance1
Understand the evolutionary tree of vertebrates: Vertebrates are a diverse group of animals that include fish, amphibians, reptiles, birds, and mammals. They evolved from a common ancestor and diversified into various lineages over millions of years.
Identify the key groups of fish: The major groups of fish include jawless fish, cartilaginous fish, ray-finned fish, and lobe-finned fish. Each group represents a different evolutionary branch.
Recognize the significance of lobe-finned fish: Lobe-finned fish are characterized by their fleshy, lobed, paired fins, which are joined to the body by a single bone. This group includes the coelacanths and lungfish, which are more closely related to tetrapods than other fish groups.
Connect lobe-finned fish to tetrapods: Tetrapods, which include amphibians, reptiles, birds, and mammals, are believed to have evolved from lobe-finned fish. The structure of their fins is similar to the limb bones of tetrapods, suggesting a common ancestry.
Conclude that lobe-finned fish are the most recent common ancestor of living tetrapods: Given the evolutionary relationship and anatomical similarities, lobe-finned fish are considered the most recent common ancestor of living tetrapods among the options provided.
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