PPT-Homologous, Analogous, and Vestigial structures

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. 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. Homologous Structures (flowers). Broccoli and Cauliflower evolved from Mustard. print. Homology: A Bouquet of Broccoli One wouldn't normally munch on a rosebud or snap off a dandelion flower for a quick snack. But in fact, in terms of homologies, when you eat broccoli or cauliflower, you are doing just that. Although not scented or suitable for centerpieces, the green tips of broccoli and the white tips of cauliflower are actually flowers. Through many generations of artificial selection, farmers modified the bright yellow blooms of the wild mustard plant into the edible, vegetal plant parts you'll find nestled next to the ranch dip on the hors d'oeuvre tray. . Book Study Guide (Assigned Monday 4/6). Answers. Chapter 15. 1. Natural selection is a mechanism for…. EVOLUTION. 2. __________ was used to produce purebred Chihuahuas and cocker spaniels.. ARTIFICIAL . . give . examples of types of evidence that Darwin gathered to develop the theory of evolution;. Structural similarities among organisms.. Geographic distribution of organisms.. The embryological similarities among organisms.. 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. . Bat wing. Mole foot. Analogous structures. are . not. evidence of a common ancestor.. Analogous structures. have different structures but a similar function.. Analogous structures. Analogous structures=evidence of convergent evolution. The fossil record. Anatomical, embryological, cellular and molecular similarities. Artificial selection . can be used as evidence for the evolutionary development of a given species. HS‑LS4‑1. Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence.. Comparative Morphology. Analogous Structures. Structures with similar . function. but different internal structure, development (bird wing and insect wings, dolphin fin and shark fin). Does . NOT . show evolutionary relationships. nd. , 2014 . Give one example of an adaptation and explain . why. it is an adaptation. . Define evolution by natural selection.. 3. Give an example of geographic isolation. . 4. How are convergent and divergent evolution different? . 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. (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. Fossil evidence for evolution. Most evidence of evolution was originally found in fossils. Fossils can preserve the structure of organisms in sedimentary rock if conditions are just right. . One area of evidence of evolution is embryology, the study of embryos. When we compare embryos we can see shared characteristics of organisms throughout their developmental process. . 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 . 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 .