Darwin observed that species on the Galapagos Islands exhibited similarities but also slight variations among them during his travels.
Darwin's meticulous observations included differences in the size and shape of beaks among finches on different islands, adaptations that seemed tailored to the specific available food sources. He also noted variations in the shell shapes of tortoises and the coloration of iguanas.
These subtle distinctions among species on the Galapagos Islands led Darwin to hypothesize that environmental factors played a role in shaping the characteristics of each population, contributing to the diversity of life. This realization ultimately laid the foundation for his groundbreaking theory of evolution, emphasizing the role of natural selection in the gradual transformation of species over time.
Complete ques:
What observations did Darwin make about the species on the Galapagos Islands in terms of their similarities and differences during his travels?