Unformatted text preview: Introduction to Biology
The Life Sciences Definition of Biology Bio life logy study characteristics of life? Characteristics of Life
Reproduction Ability to move Ability to adapt, shows evolution Metabolism respiration, digestion Made of DNA genetic material Ability to respond to environment Shows homeostasis Homeostasis `steady state' -physiological equilibrium Jccc.net Emc.maricopa.edu Levels of Organization Atom Molecule Organelles Cell- basic unit of life Tissue Organs Systems Organism Population Community Ecosystem biosphere Atoms Atoms make up elements oxygen, carbon, hydrogen Molecule Through chemical bonding, elements form large molecules proteins, carbohydrates, fats, nucleic acids, CO2 Organelles molecules within cell to help it function Not living Cell Basic unit of life Smallest unit of life Mostly microscopic Tissues Groups of cells with common function Ex: muscle tissue, nervous tissue Organs Tissues come together to form organs Examples? Systems
Organs form body systems What are the 10 body systems? How many of the body systems can you see here? Organism All the 10 body systems form one organism or body Isabelle Rose Picasaweb.com Population Organisms grouped according to similar characteristics into species species forms populations Community Populations of different species coexisting together in an area Ecosystem Different species within different communities coexist together in a large area desert, tropical rain forest Biosphere area of Earth that contains life air to land to underwater Gsfc.nasa.gov Castlefordschools.com Scientific Method Process of testing ideas Data & results must be duplicated Steps of Scientific Method 1. observation & extrapolate from what we see & make generalizations 2. formulate a hypothesis tentative statement - can lead to testable deductions 3. make a testable prediction -- begins with: if...then.. 4. experiment or observe -- Must take into account all variables by using a control group and an experimental group 5. modify hypothesis based upon results of research present findings to scientific world 6. Abcteacher.com ...
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