BCOR 12 1st Edition Lecture 1 Outline of Current Lecture I Major Themes in Biology II Chapter 22 Descent with Modification Current Lecture Major Themes in Biology 1 New properties emerge at each level in the biological hierarchy a Becomes more complex at each level 2 Organisms interact with their environment exchanging matter and energy 3 Structure and function are correlated at all levels of biological organization a Anatomy and physiology 4 Cells are organisms basic unit of structure and function a They re the most basic unit of life and this makes sense since organisms are made up of more than one cell 5 The continuity of life is based on heritable information in the form of DNA 6 Feedback mechanisms regulate biological systems a Homeostasis Evolution the overarching theme in biology that allows us to understand the unity and diversity of life Homologous structures structures in different species that are similar because of common ancestry Ex Whales humans cats all have the same forelimb bone structures yet the species are extremely different Evolution is both a pattern and a process Examples of evolution vestigial structures deep sea creatures embryology certain species look very similar when they are an embryo fossil records characteristics unique to endemic species Key Observations of Life 1 Organisms are well suited for living in THEIR environment a Ex A cactus is suited to live in a desert not the forest for that s not their environment 2 Living organisms share many characteristics DNA This demonstrates the UNITY of life 3 The Earth has a large rich DIVERSITY of living organisms 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 The 3 Domains of Life Archaea extremophiles Eukaraya Bacteria
View Full Document
Unlocking...