Presentation on theme: "1- When on the test, are we expected to know the scientific names of all plants/animals from lecture slides? SOME questions from January 20th 2- Are the."— Presentation transcript:
1- When on the test, are we expected to know the scientific names of all plants/animals from lecture slides? SOME questions from January 20th 2- Are the gradualism and punctuated equilibrium model accepted as counter-theories or coinciding theories? 3- When discussing evolution, the concept of a “common ancestor” is often mentioned, if evolution has always been occurring, where did the “common ancestor” come from or evolve from? 4- Are humans polymorhic? If so, could we evolve into separate species overtime?
Fig. 24.19 pages 478-479 Evo-devo (interface between evolutionary biology and development) Genes that control development play a major role in evolution. Slight changes in the relative rates of growth during development can change the adult form substantially. Ex: skulls of humans and chimpanzees. Evolution of morphology that arises by a modification in allometric growth is an example of heterochrony: evolutionary change in the rate or timing of developmental events.
Paedomorphosis (“child” and “formation”) If the rate of reproductive development accelerates compared to somatic development, the sexually mature stage of a species may retain body features that were juvenile structures in an ancestral species. Fig. 24.21
Chapter 26 Origin of Life Life History Chapter 28 Origins of Eukaryotic Diversity
Fig. 26.10 The Origin of Life includ. aminoacids Ancient sea Primitive atmosphere Lightning Fig. 26.11 1- Non-living synthesis of small organic molecules. 2- Joining of these small molecules into polymers. 3- Origin of self-replicating molecules, making inheritance possible.
Fig. 26.12 Fig. 26.13 4- Packaging of all these molecules into “protobionts. 5- Natural selection could refine protobionts containing hereditary information. WHERE DID LIFE ORIGINATE? 1- Inorganic molecules in shallow seas, moist sediments, seafloor, deep-sea vents or volcanoes. 2-Organic molecules from meteorites and comets.
Prokaryotes Eukaryotes Fig. 7.4Fig. 28.3 How did eukaryotic complexity evolve?