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Class Chapter 1 Lecture Presentation

Class Chapter 1 Lecture Presentation - Chapter 1...

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Biology Eighth Edition Neil Campbell and Jane Reece Introduction: Themes in the Study of Life Chapter 1
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Learning Objectives: 1. To list and briefly describe the 10 levels of biological organization. 2. To distinguish the basic differences between prokaryotic and eukaryotic cells, and the basic structure and role of DNA. 3. To distinguish between the following pairs of terms: discovery science and hypothesis-based science, quantitative and qualitative data, and inductive and deductive reasoning.
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Overview: Inquiring About the World of Life Evolution is the process of gradual change over time that has transformed life on Earth. Biology is the scientific study of life. Biologists ask questions such as: How a single cell develops into an multicellular organism How the human mind works How living things interact in communities
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Life itself defies a simple, one-sentence definition. Life is recognized by what living things do. Some properties of life are (1) order, (2) evolutionary adaptation, (3) response to the environment, (4) reproduction, (5) growth and development, and (6) energy processing and regulation. Overview: Inquiring About the World of Life
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Order The close-up of a sunflower illustrates the highly ordered structure that characterizes life
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Evolutionary adaptation The appearance of this pygmy seahorse camouflages the animal in its environment
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Response to the environment This Venus flytrap closes its trap rapidly in response to a damsefly landing on it
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Reproduction Organisms reproduce their own kind (emperor penguins)
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Growth and development Inherited information carried by genes controls the pattern of growth and development of all organisms (Nile crocodile)
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Energy processing The hummingbird obtains fuel in the form of nectar that it will use as chemical energy to power flight and work
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Regulation The regulation of blood flow through the blood vessels of this jackrabbit’s ears will help maintain constant body temperature by adjusting heat exchange with atmosphere
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Concept 1.1: Themes connect the concepts of biology Biology consists of more than memorizing factual details. Themes help to organize biological information. Unifying themes pervade all of biology.
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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. Each level of biological organization has emergent properties. Biological organization is based on a hierarchy of structural levels, each building on the levels below.
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The biosphere Communities Populations Organisms Ecosystems Organs and organ systems Cells Cell Organelles Atoms Molecules Tissues 10 µm 1 µm 50 µm The 10 Levels of Biological Organization
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(1) The biosphere includes most regions of land, most bodies of water, and the atmosphere to an altitude of several kilometers (all environments that are inhabited by life)
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(2) Ecosystems
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