Intro to BiologyIntro to BiologyUnit 1 (Chapter 1) Unit 1 (Chapter 1) The Basis of LifeThe Basis of LifePart 1Part 1

Vocabulary IntroVocabulary Intro

Section 1.1Section 1.1

BiosphereBiosphere

OrganismsOrganisms

Spontaneous generationSpontaneous generation

BiogenesisBiogenesis

CellCell

TissuesTissues

OrgansOrgans

Section 1.1 Big IdeasSection 1.1 Big Ideas

Compare different theories of the origin of lifeCompare different theories of the origin of life

Summarize the properties of lifeSummarize the properties of life

Compare different Compare different theories of the origin of theories of the origin of

lifelife VitalismVitalism

Popular 2300 hundred years agoPopular 2300 hundred years ago Living things exist because they have been Living things exist because they have been

filled with special forces (ethers)filled with special forces (ethers) It was the well accepted belief for 2000 yearsIt was the well accepted belief for 2000 years

Spontaneous GenerationSpontaneous Generation The process of life beginning when ethers enter The process of life beginning when ethers enter

nonliving thingsnonliving things Ex. The belief that rotting meat actually Ex. The belief that rotting meat actually

produced maggotsproduced maggots

Compare different Compare different theories of the origin of theories of the origin of

lifelife BiogenesisBiogenesis

Francesco Redi – Maggot/meat experimentFrancesco Redi – Maggot/meat experiment click here for video ““bio” means “life”, “genesis” means bio” means “life”, “genesis” means

“beginning”“beginning” Scientific method at workScientific method at work

What was the control?What was the control? What was the independent variable?What was the independent variable? What was the dependent variable?What was the dependent variable? Conclusion: maggots are indeed the product of Conclusion: maggots are indeed the product of

fliesflies

Compare different Compare different theories of the origin of theories of the origin of

lifelife Changes in the theories in all science often Changes in the theories in all science often

happen as a result of an increase of happen as a result of an increase of technologytechnology Ex: Telescopes and MicroscopesEx: Telescopes and Microscopes

Both allowed us to see things we had not been Both allowed us to see things we had not been able to prior to their inventionable to prior to their invention

Human discoveries of the time:Human discoveries of the time: The heart is a mechanical pump; not just an organ The heart is a mechanical pump; not just an organ

of emotionof emotion

These new methods for discovery allowed These new methods for discovery allowed scientists to determine “the properties of life”scientists to determine “the properties of life”

Summarize the Summarize the properties of lifeproperties of life

Similarities between living and nonliving thingsSimilarities between living and nonliving things Both are composed of the elements (the materials Both are composed of the elements (the materials

present on Earth)present on Earth) They all obey the same laws of natureThey all obey the same laws of nature

Characteristics that make living things different:Characteristics that make living things different: OrganizationOrganization EnergyEnergy Growth/developmentGrowth/development ReproductionReproduction Response and adaptationResponse and adaptation

Summarize Summarize the properties the properties

of lifeof life

Summarize Summarize the properties the properties

of lifeof life

Summarize Summarize the properties the properties

of lifeof life

Basic StructureBasic Structure

Cells = fundamental units of life that exhibit Cells = fundamental units of life that exhibit all of the properties of living thingsall of the properties of living things Cells contain specialized compartments that do Cells contain specialized compartments that do

jobsjobs

Tissues are groupings of cells that work Tissues are groupings of cells that work together to perform specific functionstogether to perform specific functions

Organs = groupings of tissues that function Organs = groupings of tissues that function together for a specific purposetogether for a specific purpose

Organ system – a group of organsOrgan system – a group of organs