Question

after studying the fossil record of the seahorse, scientists have determined that the seahorse diverged from the pygmy pipehorse. modern seahorses swim upright, whereas pygmy pipehorses lack this ability. which statement best describes the evolution of modern seahorses?
select one:
○a. modern seahorses evolved due to natural selection.
○b. modern seahorses do not share a common ancestor with pygmy pipehorses.
○c. an individual pipefish evolved into a modern seahorse.
○d. modern seahorses have shown no evolutionary change over time

Explanation:

• Option b is incorrect because the question states seahorses diverged from pygmy pipehorses, meaning they share a common ancestor.
• Option c is incorrect because evolution occurs in populations over generations, not in a single individual.
• Option d is incorrect because the upright swimming trait is a clear evolutionary change from their pipehorse ancestor.
• Option a is correct: the upright swimming trait of modern seahorses would have provided a survival or reproductive advantage, leading to natural selection favoring this trait in seahorse populations over time.

Answer:

a. Modern seahorses evolved due to natural selection.