Which of the following examples illustrates the evidence for evolution? 1) existence of transitional forms in the development of the organic world 2) acclimatization of plants and animals 3) seasonal changes in plant life 4) adaptation of fish to life in different

The best example of evidence for evolution is the existence of transitional forms in the development of the organic world. Transitional forms are fossils that show intermediate states between two different species, and they provide evidence of the gradual change of one species into another over time. For example, the fossil record provides evidence that birds evolved from theropod dinosaurs, and whales evolved from land-dwelling mammals. This evidence supports the theory of evolution by natural selection, which states that species evolve over time through a process of genetic variation and selection. Acclimatization of plants and animals, seasonal changes in plant life, and adaptation of fish to life in different environments are all examples of adaptation, which is a result of evolution.