PPT-Homologous and Analogous Structures

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. 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 . IMSS . BIOLOGY . . ~. . . SUMMER . 2011. LEARNING TARGETS. To understand that biological evolution . involves . descent with modification. . To explain and give different types of evidence for the key concept of biological evolution: all life shares a common ancestor.. 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. . Homologous chromosomes . – identical chromosomes. . …same length, . centromere. , same staining pattern. . …exception…males sex chromosome. 1-22 . autosomes. . sex . chromsomes. Homologous chromosomes. Evolution Videos. How Evolution Works. http://www.youtube.com/watch?v=hOfRN0KihOU. What is Evolution?. http://www.youtube.com/watch?v=GhHOjC4oxh8. What is Natural Selection?. http://www.youtube.com/watch?v=0SCjhI86grU. 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. Organism DNA. 1a. Some of the strongest evidence for evolutionary relationships comes from studying the DNA of different organisms.. 1b. The fact that all organisms use the same DNA molecule to code for genetic information suggests that these organisms share a distant ancestor.. 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.. is the process of change over time.. Evidence of evolution. . Biogeography. is the study of where organisms live now and where their ancestors lived in the past.. Patterns in the distribution of living and fossil species tell us how modern organisms evolved from their ancestors.. Causes of Evolution: . Natural Selection . Migration. Mutation. What is Natural Selection? . Survival of the ‘fittest’. Occurs through INHERITED adaptations. What is migration?. Movement of animals from one area to another. . 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. . Simawi. (Secretary of State for Housing, Communities and Local Government intervening). [2018] EWHC 2733. Hannah Gardiner. Second Successions and . Simawi. 10 June 2019. Second Successions and . Simawi. Advanced Higher Biology. Miss A Aitken. National 5 Re-Cap. Haploid: One set of chromosomes – 23 . All gametes (sex cells – sperm and egg) are haploid. Diploid: Two sets of chromosomes – 46 (or 23 pairs).