Chapter 1 - Class Notes Chapter 1 Themes in the Study of...

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Unformatted text preview: Class Notes Chapter 1: Themes in the Study of Life 8.21.09 Chapter 1 - Introduction: Themes in the Study of Life Overview: Inquiring About the World of Life • Evolution – is the central theme in the study of life • Biology – the scientific study of Life • Biologists ask questions such as: – How a single cell develops into an organism – How the human mind works – How living things interact in communities Common Processes • These are the common properties of life and the processes that every organism must perform in order to survive • Life defies a simple, one-sentence definition • Life is recognized by what living things do What properties of life are demonstrated in this flower? The Mangolia Flower is in a bowl shape, it has tough petals so beetles can sit on them, it has multiple reproductive organs to sustain survival adaptation to environment Concept 1.1: Themes connect the concepts of biology • Biology consists of more than memorizing factual details • Themes help to organize biological information Evolution, the Overarching Theme of Biology • Evolution makes sense of everything we know about living organisms • Organisms living on Earth are modified descendents of common ancestors Theme : New properties emerge at each level in the biological hierarchy • Life can be studied at different levels from molecules to the entire living planet • The study of life can be divided into different levels of biological organization Class Notes Chapter 1: Themes in the Study of Life 8.21.09 Extended Example - Me Biosphere – All things land, water, animals, everything on earth (ie. Earth) Ecosystem – all organisms/ interactions with environment in one place (ie. Georgia Tech) Communities – Only organisms (Humans, Cats, Dogs, Snakes, Insects,etc) Populations – Same organism and same place (Humans) Organism – the specimen under discussion (Me) Organ system / Organ – The organs with which the organism is made (Digestive system / Liver) Tissue – the component that makes the organs (Muscular tissue) Cells – smallest organism (white blood cells) Organelles – Cells made of organelles (ie mitochondria) Molecules/atoms – everything is made of atoms and molecules Breaking things down to molecules is the process of Reductionism Emergent Properties • Emergent properties characterize non biological entities as well o For example, a functioning bicycles emerges only when all of the necessary parts connect in the correct way • Understanding Biology balances reductionism with the study of emergent properties break it all up and then put it back together again...
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Chapter 1 - Class Notes Chapter 1 Themes in the Study of...

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