PPT-Homologous structures Structures on different organisms are homologous when they have

Homologous structures Human Arm Bat Wing Whale Flipper Analogous Structures Similar functions but NOT structurally related Insects are arthropods and birds are vertebrates The wing of a bird and the wing of a butterfly are examples of . Homologous and Analogous Structures. Need to Know. The difference between homologous and analogous structures and how this relates to evolution.. Convergent evolution. Concept 19.3: Evolution is supported by an overwhelming amount of scientific evidence. Chapter 15. Darwin's Theory of Evolution. What is Evolution?. Evolution is…... Change in a species over time. The process by which modern organisms have descended from ancient organisms. A theory. Well-supported testable explanation (hypothesis) of phenomena that have occurred in the natural world. Erica, . Nao. , Christian and Justine. What are Homologous Structures? . Structures derived . from a common . ancestor or . same . evolutionary or . developmental . origin. May not perform . the same function but they share a common ancestral origin. . 1. Which structures show evidence of common ancestry?. analogous. homologous. [Default]. [MC Any]. [MC All]. 2. How does embryology show evidence of common ancestry?. Shows all organisms have offspring that are exactly the same. Lecture 65 – Lecture 66. Evidence of Evolution. Ozgur. . Unal. 1. Support for Evolution. 2. The. theory of evolution states that all organisms on Earth have descended from a common ancestor.. The theory explains the existing data and suggests further areas for experimentation.. Derived traits. are newly evolved features, such as feathers, that do not appear in the fossils of common ancestors. .. Ancestral traits. are more primitive features, such as teeth and tails, that do appear in ancestral forms.. Brain Warm Up. What different ways do these animals use to move about?. What traits does each animal have that help it move about as it does?. 15-1 The Puzzle of Life’s Diversity. Humans share the earth with millions of other kinds of organisms of every imaginable shape, size, and habitat.. A hypothetical trace of evolution. One original common ancestor. Scientists use both morphology and genetics to produce phylogenic trees. Morphology- share similar physical characteristics. Analysis of genetic similarity. 2. Fossils provide evidence of organisms that lived in the past. 3. The wing of a bat has bones that are similar to those in the human arm. 4. DNA can tell us how closely related 2 organisms are.. 5. Whales are descended from land dwelling mammals. Similar Figures Similar Similar figures have the same shape, but not necessarily the same size. Similar Polygons 14 m 7m 60° 60° The ratio formed by the sides is the scale factor : 14m = 2m (5) . Webquest. Comparative anatomy. provides . evidence of evolution . because it shows that various organisms share a common ancestor.. http://. cyemae.wordpress.com. /evolution-of-man/. H. omologous structures. Structures. - features similar in structure, but appear in different organisms with different functions.. Analogous structures-. structures similar in function, but are not similar in origin.. Vestigial . In microbiology, . taxa. are . intially. constructed from . strains. . A . strains . is made up of all the descendants of a pure culture. It is usually a succession of cultures derived from an . intial. What is a scientific theory?. In science, the word theory applies to a well-tested explanation that unifies a broad range of observations and hypotheses and that enables scientists to make accurate predictions about new situations..