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Chapter 1 Ten Themes In The Study Of Life. Hierarchy of Organization Atoms Molecules Organelles Cells Tissues Organs Systems Organism Population Community.

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Presentation on theme: "Chapter 1 Ten Themes In The Study Of Life. Hierarchy of Organization Atoms Molecules Organelles Cells Tissues Organs Systems Organism Population Community."— Presentation transcript:

1 Chapter 1 Ten Themes In The Study Of Life

2 Hierarchy of Organization Atoms Molecules Organelles Cells Tissues Organs Systems Organism Population Community Ecosystem Biome Biosphere Ecosphere

3 Emergent Properties Order – tendency to self organize Reproduction – biogenesis Growth and development Energy utilization Response to the environment Homeostasis – self regulation Evolutionary adaptation

4 With each step upward in the hierarchy of biological order, novel properties emerge that were not present at the simpler levels of organization. The whole is greater than the sum of its parts.

5 How do we seek understanding? Reductionism – reducing complex systems to simpler components Holism – Study the entire system to truly understand it

6 The Cell Theory 1. All living things are composed of cells 2. All cells come from other cells 3. Cells are the units of structure and function

7 Two Major Kinds of Cells Prokaryotic – first cell Eukaryotic – true cell

8 E.M. of Prokaryotic Cells

9 DNA Basics DNA is the substance of genes Double helix 4 Bases (Adenine, Guanine, Cytosine, Thymine Self-replicating molecule Changes over time All forms of life employ essentially the same genetic code

10 Organisms Are Open Systems That Interact Continuously With Their Environments. Living things both alter and are changed by their environment Materials are recycled Energy is lost as heat and not recycled

11 Energy Flow In The Ecosystem

12 Living Systems Are Regulated Many Biological Processes Are Self - Regulating Through Feedback Mechanisms

13 Negative Feedback Positive Feedback

14 Evolution, Unity, And Diversity The Evolutionary Connections Among All Organisms Explain the Unity and Diversity of Life.

15 The Three Domains of Life

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17 Descent With Modification

18 Connections Observation #1– Individual variation Observation #2 – Struggle for existence Inference – Differential reproductive success or Natural Selection Natural Selection Is An Editing Process

19 The Process Of Science Science Is A Way Of Knowing

20 Idealized Scientific Method Inductive Reasoning

21 Hypothetico-deductive Reasoning If…then Logic

22 Fishing For Answers

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24 Theories Have Broad Explanatory Power Theories Are Comprehensive

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