Presentation on theme: "What is Biology? Biology is the study of life"— Presentation transcript:
1What is Biology? Biology is the study of life More specifically: the scientific study of living organisms and their interactions with the environment
2Why Should I Know About Biology? All living things on Earth are tied together by common traits and rely on one another for their common survival!Q: Trees and people are both living organisms. Which branches of biology would study BOTH trees and humans?A: Biochemistry, ecology, cell biology, genetics, evolutionary theory
3What Kinds of Biology Are There? SOME of the branches of biology that scientists can specialize in:Biochemistry: study of chemistry of lifeBotany: study of plantsEcology: study of how organisms interact with each other and their environmentCell Biology: study of life on the cellular levelGenetics: study of heredityZoology: study of animalsMicrobiology: study of microscopic organismsNeurobiology: study of the brain
4What Do Biologists Do?Health CareBiotechnologyEnvironmental Science
5Characteristics of Life Organismanything that possesses all 7 characteristics of life1. Cellular organization2. Homeostasis3. Metabolism4. Responsiveness5. Reproduction6. Heredity7. Growth and Development
6Cellular Organization Smallest unit capable of all life functionsHighly organizedTINYSurrounded by a membraneBasic structure is the same for ALL living organismsScientists estimate that there are 5-10 MILLION different species!!
7HomeostasisMaintenance of stable internal conditions in spite of changes in the external environmentSpecies strive to survive at homeostasisInvolves external and internal stimuliWithout this ability to adjust organisms would not survive
8MetabolismSum of all chemical reactions carried out within a living organismEnergy is the ability to do workAlmost all energy initially comes from the SUNAllows organisms to grow, reproduce, and maintain homeostasis!
9Response to Environment All organisms must respond to their external environmentStimuluscondition in the environment that requires and organism to adjustResponsereaction to stimulusHow the organism responds is imperative to the survival of the species and ultimately the environment
10Reproduction Production of offspring NOT essential to the individual organism, but IS necessary for the survival of the species!
11Heredity When traits are passed on to offspring. Why kids tend to look like their parentsInherited characteristics can change over generations. This process is known as evolution
12Growth and Development results in an increase in the amount of living material and formation of new structuresDifferent parts grow at different timeDevelopmentchanges that take place during the life of an organismsWhat changes have happened in you in the last year?