Chapter 1- What is Life

Chapter 1- What is Life - Introduction 2010 D Julian...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
1/5/2010 1 Introduction © 2010 D. Julian Order Evolutionary adaptation Response to the environment What is life? Reproduction Growth and development Energy processing Regulation © 2010 D. Julian Entropy Inanimate matter tends to quickly achieve a rest state… This is the state of thermodynamical equilibrium or "maximum entropy". © 2010 D. Julian
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1/5/2010 2 Entropy and metabolism Life avoids this rapid decay into an inert state. The living organism forestalls such decay by eating drinking breathing Inanimate matter tends to quickly achieve a rest state… This is the state of thermodynamical equilibrium or "maximum entropy". organism forestalls such decay by eating, drinking, breathing and, in the case of plants, assimilating. This is called metabolism. The living organism constantly moves towards maximum entropy (i.e. death). It can only keep alive by taking negative entropy from its surroundings. In other words, it frees itself from the entropy it produces. (E. Schrodinger 1944) © 2010 D. Julian Life: Order © 2010 D. Julian Life: Reproduction © 2010 D. Julian
Background image of page 2
1/5/2010 3 Life: Growth and development © 2010 D. Julian Life: Energy processing © 2010 D. Julian Life: Regulation Organisms use chemical bond energy to manipulate and maintain the chemical and physical medium within cells and within whole organisms. In this way, organisms maintain control over their internal environment (homeostasis) in an effort to maintain “optimal” internal conditions for life. © 2010 D. Julian
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1/5/2010 4 Order Evolutionary adaptation Response to the environment What is life? Reproduction Growth and development Energy processing Regulation © 2010 D. Julian Life: Evolutionary adaptation Adaptations evolve over many generations by the reproductive success of those individuals with heritable traits that are best suited to their environment. © 2010 D. Julian Theme: Emergent properties New properties emerge at each level in the biological hierarchy. The biosphere Organs and organ systems Cells Cell 10 μm © 2010 D. Julian Fig. 1.4 Communities Populations Organisms Ecosystems Organelles Atoms Molecules Tissues 1 μm 50 μm
Background image of page 4
1/5/2010 5 Theme: Emergent properties Organs and organ systems Cells Cell Organelles 10 μm © 2010 D. Julian Fig. 1.4 Atoms Molecules Tissues 1 μm 50 μm Theme: Exchange of matter and energy Sunlight Ecosystem Heat Cycling of chemical nutrients Producers (plants and other photosynthetic organisms) © 2010 D. Julian Fig. 1.5 Heat Chemical energy Consumers (such as animals) Theme: Form fits function Structure and function are correlated at all levels of biological organization.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/31/2011 for the course BSC 2010 taught by Professor Bowes during the Spring '08 term at University of Florida.

Page1 / 15

Chapter 1- What is Life - Introduction 2010 D Julian...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online