Chap 1 PPT - CHAPTER ONE Introduction: Themes in the Study...

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CHAPTER ONE Introduction: Themes in the Study of Life.
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Cy Fair Environment
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Chapter Overview Organisms are adapted to the environments they live in Evolution is the process of change that has transformed life on Earth Biology is the scientific study of life There are themes that help connect the concepts in biology What is life?
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Properties of life. Order Evolutionary Adaptations Response to Environment Reproduction Growth and Development Energy processing Regulation
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Order All chemical reactions making up living organisms must occur in the correct order for the organism to function correctly. The anatomy (structure) and the physiology (function) is highly ordered
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Evolutionary adaptation Evolution is responsible for all the: unity organisms show the same or similar characteristics and the diversity organisms show different characteristics of life
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Evolutionary adaptation Camouflage (Poorwill) Mimicry
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Response to the environment Adaptation Inherited characteristics that enable an organism to survive and reproduce in a specific environment. Acclimation Physiological adjustment to a change in the environment
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Response to Environment
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Reproduction 1. Sexual Two individuals involved 2. Asexual Only one organisms required Binary Fission Budding Fragmentation Cloning Vegetative Parthenogenesis
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Reproduction
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Growth and development Growth – An increase in the cell number and size. Development – The advance or progression of an organism.
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Growth and development
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Energy processing Energy – All living organisms work, this requires a source of energy. Some of the energy is used while some is given off.
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Regulation All chemical reactions have to be regulated. Some need to initiated while others need to be paused or terminated. Homeostasis is ability to keep the body in a steady state irrespective of what is happening in the external environment – this is often achieved by using feedback mechanisms.
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Seven themes that connect the concepts of biology Evolution Emergent Properties (biological hierarchy) Interaction with Environment Structure and function are connected Cells are the basic unit of structure and function Continuity of life needs inherited information Feedback mechanisms regulate living systems
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Evolution The Main Theme of Biology Evolution makes sense of everything we know about living organisms Organisms living on Earth are modified descendents of common ancestors The evolutionary view of life came into focus in
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Chap 1 PPT - CHAPTER ONE Introduction: Themes in the Study...

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