Chapter 1
This presentation is the property of its rightful owner.
Sponsored Links
1 / 22

Chapter 1 PowerPoint PPT Presentation


  • 74 Views
  • Uploaded on
  • Presentation posted in: General

Chapter 1. Biology Introduction. Why Biology?. Understand your world Make informed decisions Self Family Medical Diet Make informed votes Understand significance of accomplishments. Definition. Bios = life ology = study of Biology = study of life. Living things have….

Download Presentation

Chapter 1

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Chapter 1

Chapter 1

Biology Introduction


Why biology

Why Biology?

  • Understand your world

  • Make informed decisions

    • Self

    • Family

    • Medical

    • Diet

  • Make informed votes

  • Understand significance of accomplishments


Definition

Definition

  • Bios = life

  • ology= study of

  • Biology = study of life


Living things have

Living things have….

  • Organization

    • Atom

    • Molecule

    • Cell

    • Tissue

    • Organ

    • Organ system


Living things have1

Living things have….

  • Organization (cont.)

    • Multicelled organism

    • Population

    • Community

    • Ecosystem

    • Biosphere


Living things must

Living things must…

  • Acquire energy

    • Autotrophs

    • Heterorophs

  • Metabolize

  • Maintain homeostasis


Living things must1

Living things must….

  • Grow

  • Reproduce

  • Respond

  • Adapt


Classification

Classification

  • Taxonomy—ID and organize into logical groups

  • Nomenclature—name organisms

    • Binomial nomenclature (Genus, species)

    • Homo sapiens

    • Canis lupus

    • Felisconcolor


Hierarchy of classification

Hierarchy of Classification

  • Domain Eukarya

  • KingdomAnimalia

  • PhylumArthropoda

  • ClassInsecta

  • OrderLepidoptera

  • FamilyDanaidae

  • GenusDanaus

  • Speciesplexippus

    Monarch Butterfly


Domains

Domains

  • Eubacteria

  • Archaebacteria

  • Eukarya

    • Kingdom Protista

    • Kingdom Fungi

    • Kingdom Plantae

    • Kingdom Animalia


Scientific method

Scientific Method

  • Gather information about the world

  • Do it objectively

  • Explain the natural world using rules or patterns in the natural world

  • Explanations that are testable

  • Can use information for prediction

  • No conclusion drawn in science is final!

    • However, can say many things with high probability


Scientific method1

Scientific method

  • Observation

  • Hypothesis

  • Test

  • Analyze & Interpret

  • Repeat

  • Theory


Experimental design

Experimental design

  • Control Group

    • Standard of Comparison

    • Identical to testing group other than the variable being tested

  • Sampling Error

    • Certain amount of error in any study

    • Try to minimize by taking large sample sizes


Experiment

Experiment…

  • Observation: Some students fall asleep in Dr. Bern’s class

  • Hypothesis: Dr. Bern is the most boring Biology instructor

  • Test: Count number of sleeping students in Dr. Bern’s and Mr. Harnden’s classes

  • Results: 3/48 Students sleeping in Dr. Bern’s class, 4/48 students sleeping in Mr. Harnden’s class

  • Repeat: Count sleeping students in Dr. Bern’s and Ms. Henderson’s classes

  • Results: 3/48 students sleeping in Dr. Bern’s class, 2/48 students sleeping in Ms. Henderson’s

  • Analysis: 4% of students sleep in Ms. Henderson’s class, 6% in Dr. Bern’s, 8% in Mr. Harnden’s. There is a 3% margin of error.

  • Conclusion: Student’s sleep in Dr. Bern’s class at the same rate as other Biology instructors

  • Theory: Whether or not students fall asleep in class doesn’t depend on the instructor


Biological therapy experiments

Biological Therapy Experiments

  • Can we use viruses that attack bacteria (bacteriophages) to fight infections?


Experiment 1

Experiment 1

  • Hypothesis - Bacteriophages can protect mice against infectious bacteria

  • Prediction - Mice injected with bacteriophages will not die as a result of bacterial injection


Experiment 1 test

Experiment 1—test

  • Experimental group

    • Inject with bacteria and bacteriophage

  • Control group

    • Inject with bacteria and saline


Experiment 1 results conclusion

Experiment 1—results & conclusion

  • Experimental group

    All mice lived

  • Control group

    All mice died

  • Conclusion - Bacteriophage injections protect mice against bacterial infections


Experiment 2

Experiment 2

  • Prediction - Bacteriophage injections will be more effective treatment than single dose of the antibiotic streptomycin

  • Test - Mice injected with bacteria, then with saline, streptomycin, or bacteriophage


Experiment 2 results

Experiment 2—results

  • With 2nd injection:

    • Bacteriophage - 11 of 12 mice lived

    • 60 mg/gm streptomycin - 5 of 12 lived

    • 100 mg/gm streptomycin - 3 of 12 lived

    • Saline - all mice died

  • Conclusion - Bacteriophage treatment can be as good or better than antibiotic


Limitations

limitations

  • Limited to our knowledge and understanding of the natural world

  • Cannot answer philosophical, moral, or ethical questions

  • Limited by man’s falibility


  • Login