TAILIEUCHUNG - Lecture AP Biology - Chapter 22B: Evidence for evolution

Lecture AP Biology - Chapter 22B: Evidence for evolution. After studying this chapter you will be able to understand: Several examples of evidence for evolution; the difference between structures that are homologous and those that are analogous, and how this relates to evolution. | Ch. 22 Warm-Up Compare and contrast natural selection vs. artificial selection. What are the key ideas of natural selection? Define and give an example for the following: Homologous structure Vestigial structure Analogous structure Descent with Modification: A Darwinian View of Life Part B: Evidence for Evolution What you must know: Several examples of evidence for evolution. The difference between structures that are homologous and those that are analogous, and how this relates to evolution. Recap main ideas of natural selection: Evolution is change in species over time. There is overproduction of offspring, which leads to competition for resources. Heritable variations exist within a population. These variations can result in differential reproductive success. Over generations, this can result in changes in the genetic composition of the population. Remember: Individuals do NOT evolve! Populations evolve. Evidence for Evolution: Direct Observations Fossil Record Homology Biogeography Evidence for Evolution 1. Direct Observations 2. Fossil Record 3. Homology 4. Biogeography Evidence for Evolution: 1. Direct Observations Examples: Insect populations become resistant to pesticides (DDT) Antibiotic-resistant bacteria (MRSA) Peppered moth (pollution in city vs. country) Evidence for Evolution: 2. Fossil Record Fossils = remains or traces of organisms from past Found in sedimentary rock Paleontology: study of fossils Show evolutionary changes that occur over time and origin of major new groups of organisms Ankle bones Prokaryotes (oldest fossils) eukaryotes (fish – amphibians – reptiles – birds – mammals) Transitional forms = links to modern species Evidence for Evolution: 3. Homology Homology: characteristics in related species can have underlying similarity even though functions may differ Examples: Homologous structures: similar anatomy from common ancestors (eg. forelimbs of human/cat/whale/bat) Embryonic homologies: similar early development (eg. vertebrate .

• Sinh học
• Lecture AP Biology
• Systems biology
• Biological sciences
• Biological organization
• Evidence for evolution
• Convergent evolution
• Conservation biology
• Global change
• Levels of biological organization
• Elements of life
• Atomic structure
• Hydrogen bonding
• Water’s properties
• Importance of carbon
• Diversity of carbon
• Nucleic acids
• Large biological molecules
• Cell theory
• Cellular function
• Membrane structure
• Membrane function
• Anabolic pathways
• Law of thermodynamics
• Cellular respiration
• Chemical energy
• Calvin cycle
• Light reactions
• Cell communication
• Cell signaling
• Cell cycle
• Cell division
• Sexual life cycles
• Inheritance of genes
• Mendelian genetics
• Mendel’s experimental
• Chromosomal basis of inheritance
• Human development
• Molecular basis
• Structure of DNA
• Genetic information
• Gene expression
• Genetics of viruses
• Metabolic pathways
• Viral reproduction
• Lysogenic reproductive cycles
• Recombinant DNA technology
• Restriction enzymes
• Genome sequencing
• Gene density
• Darwinian view of life
• Evolutionary theory
• Evolution of populations
• Natural selection