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answer choices many animals have homologous structures due to common ancestry Many animals have vestigial structures from an ancestor We can observe changes in life forms by observing the fossil record All of these are evidence for evolution Question 12 180 seconds Q. The fossil record, though incomplete, provides information about what species existed at particular times of Earths history. Homologous structures are those structures that have the same morphology or structure but have different functions to perform. For example, the wings of bats and birds, shown in Figure below, look similar on the outside. The differences show they developed from different ancestors. Comparative Anatomy - Structures, Evolutionary, Organisms, and - JRank Copy. There are many types of evidence supporting evolution, including studies in the molecular biology field, such as DNA, and in the developmental biology field. The analogous organs provide evidence for the evolution in another way. (variation is) different phenotypes/differences between individuals in a population/species, Explain the evolution of antibiotic resistance in bacteria.(6). Image modified from. Evolution has reduced their size because the structures are no longer used. Latest answer posted December 07, 2018 at 12:04:01 PM. Iftheaminoacidsequenceofthetwoorganismsaresimilar,wouldtheirDNAbealsosimilar? Analogous structures are not necessarily evidence that two species came from a common ancestor. At the most basic level, all living organisms share: These shared features suggest that all living things are descended from a common ancestor, and that this ancestor had DNA as its genetic material, used the genetic code, and expressed its genes by transcription and translation. For example, the wings of bats and birds, shown in Figurebelow, look similar on the outside. They inherited this pattern from a common ancestor. What are vestigial structures? (2 marks) Earth's rocks form layers on top of each other over very long time periods. Australias marsupial species are very diverse and fill a wide range of ecological roles.