Answer: 1, Darwin proposed that species can change over time, that new species come from pre-existing species, and that all species share a common ancestor. In this model, each species has its own unique set of heritable (genetic) differences from the common ancestor, which have accumulated gradually over very long time periods.
answer: 2, organisms with similar anatomical features are assumed to be relatively closely related evolutionarily, and they are assumed to share a common ancestor. ... Since these structures are so similar, they indicate an evolutionary relationship and a common ancestor of the species that possess them
answer: 3, it provides evidence for evolution as embryo formation in widely-divergent groups of organisms tends to be conserved. Another form of evidence of evolution is the convergence of form in organisms that share similar environments.
answer: 4, Molecular similarities provide evidence for the shared ancestry of life. DNA sequence comparisons can show how different species are related. Fossils provide evidence of long-term evolutionary changes, documenting the past existence of species that are now extinct.
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