BSC 101 1st Edition Lecture 3Outline of Last Lecture I. Section 1.3a: Atoms, Molecules, and Macromolecules in DepthII. Section 1.3b: Eukaryotic and Prokaryotic CellsIII. Section 1.3c: Tissues, Organs, and Organ SystemsIV. Section 1.4: Natural SelectionV. Section 1.5: The Process of Scientific InvestigationOutline of Current Lecture I. Morphologya. Vestigial Structuresb. Homologous Structuresc. Analogous StructuresII. FossilizationCurrent LectureMorphology Science is driven by curiosity. There isn’t just one scientific method.o You can go in many different ways to find the answer. The scientific method works only on studies of the natural world.o Rules out studies of the supernatural like ghosts and religion. Morphology: the study of the forms of things.o Vestigial Structures: structures that have been modified based on their environment.o Homologous Structures: came from a common ancestor and show the same order and structure but serve different functions.o Analogous Structures: all have the same function but came to that solution in different ways with no common ancestry. (Ex; wings on a butterfly vs. wings on a bird)Fossilization See figure 1-24 on page 29 in the textbook.These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute. Archaeopteryxo Bird with reptilian features.o Example of a transitional species. How to determine the age of a fossil:o Numerical dating Old fossils will be found deeper in the ground, the newer fossils will be found on top.o Half-Lives How to tell if two organisms share a common ancestor:o Developmental patterns Figure 1-26 on page 30 in textbooks.o Molecular Data The closer a nucleotide sequence, the closer the ancestor