Final answer:
True, Charles Darwin did wonder if similar species on the Galápagos Islands could be from the same species, leading to his formulation of the theory of natural selection.
Step-by-step explanation:
After his voyage on the HMS Beagle, it is true that Charles Darwin wondered whether similar species from the Galápagos Islands could once have been members of the same species. Darwin's observations in the Galápagos marked a pivotal moment in his thinking on evolution. He noted that similar species on different islands had distinct differences; for instance, the Galápagos finches had a variety of beak shapes and sizes that helped them adapt to different food sources. This led Darwin to conceive his theory of natural selection, which suggests that species evolve over time through variations that enhance their survival.In addition to the finches, Darwin also observed differences in the giant Galápagos tortoises from one island to another. He saw that the tortoises had different shell shapes depending on their environment, which supported his ideas about species adapting to their surroundings. His in-depth exploration and collection of specimens provided him with the evidence needed to develop his groundbreaking theory.