integrated science ch. 1 the study of life. i. science -an ongoing, inquiry-based process to...
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IntegrateIntegrated d
ScienceScienceCh.Ch. 11
The Study The Study of Lifeof Life
I. Science- an ongoing, inquiry-based
process to understand the world around us
- relies on evidence- challenges accepted theories- undergoes peer review
II. Scientific Method
- a logical series of problem solving procedures
A. Ask an Experimental Question
B. Form a Hypothesis- a testable explanation
C.Collect Data 1. Controlled Experiment
a)Experimental Group: - the part of an experiment exposed to the experimental factorb)Control Group: - the part of the experiment that does not receive the experimental factor - used for comparison
2.Experimental Design
a) Manipulated (independent) Variable- the one variable being tested (experimental factor)
b) Responding (dependent) Variable- a variable that is measured in a controlled experiment- changes in the responding variable result from changes in the manipulated variable
c) Constants (Controlled Variables)- factors that remain fixed during an experiment
3.Data - information gained from
observations
- Quantitative: numerical (metric system used)
- Qualitative: descriptive
Jane Goodall collecting qualitative data on chimpanzee behavior
Jane Goodall collecting qualitative data on chimpanzee behavior
D.Analyze the Data- look for patterns to explain the
data
- graphs, tables, and statistical analysis used
E. Report Conclusions
- Is the hypothesis supported or rejected by the data?
- Experimental findings are subjected to peer review.
- If the experiment has merit, it may be published.
F. What is a Theory? - explanation that is continually
supported by evidence- help us understand the world- used to make predictions
III. Biology- the science of life- 8 Characteristics of Life
distinguish living organisms from nonliving
A. Cellular Structure
Paramecium and Didinium
Paramecium and Didinium
Leaf tissueLeaf tissue
B. Organization
O
H H
CH2OH
SubatomicElectronElectronNeutronNeutronProtonProton
NitrogenNitrogenCarbonCarbonHydrogenHydrogen OxygenOxygen
DNADNAGlucoseGlucoseWaterWater
NucleusNucleusChloroplastChloroplastMitochondrionMitochondrion
Nerve CellNerve Cell
Atomic
Molecular
Organelle
Cellular
B. Organization
TissueNervous TissueNervous Tissue
BrainBrain
NervousNervousSystemSystem
PronghornPronghornAntelopeAntelope
Organ
Organ System
Organism
B. Organization
PopulationHerd of PronghornsHerd of Pronghorns
HawkHawk
WaterWater
Earth’sEarth’ssurfacesurface
Community
Ecosystem
Biosphere
PronghornsPronghorns
HawkHawk GrassGrassPronghornsPronghorns
SnakeSnakeBushesBushes SoilSoilAirAir
SnakeSnake
C. Growth and development 1. Growth:
- increase in size or number of cells
Click on picture
Sea Urchin Early
Embryonic Developme
nt
Sea Urchin Early
Embryonic Developme
nt
C. Growth and development 1. Growth:
- increase in size or number of cells
Roundworm
Embryonic Developme
nt
Roundworm
Embryonic Developme
nt
Click on picture
C. Growth and development 2. Development:
- increase in complexity
Monarch Butterfly
Development
Monarch Butterfly
Development
Egg Hatching
C. Growth and development 2. Development:
- increase in complexity
Monarch Butterfly
Development
Monarch Butterfly
Development
Larva Eating
C. Growth and development 2. Development:
- increase in complexity
Monarch Butterfly
Development
Monarch Butterfly
Development
Chrysalis Pupating
C. Growth and development 2. Development:
- increase in complexity
Monarch Butterfly
Development
Monarch Butterfly
Development
Adults Emerging
C. Growth and development 2. Development:
- increase in complexity
Common Whelk
D. Reproduction - asexual vs. sexual
E. coli showing binary fission Human egg and sperm
Click on picture
D. Reproduction
- asexual vs. sexual
parents:
offspring:
1 2
genetically identical
genetically unique
D. Reproduction
- asexual vs. sexual
parents:
offspring:
1 2
genetically identical
genetically unique
1 cell splitting into 2 cells
Asexual or sexual?
D. Reproduction
Asexual or sexual?
Beetle pollinating a flower
D. Reproduction
Asexual or sexual?
D. Reproduction
Asexual or sexual?
Hydra budding
D. Reproduction
Asexual or sexual?
Earthworms Mating
D. Reproduction
Asexual or sexual?
Sheep clones
D. Reproduction
E.E. Responds to stimuliResponds to stimuli
E.E. Responds to stimuliResponds to stimuli
F. Requires energy 1. autotrophs:
- make their own food
- get food from other organisms
Cycad photosynthesizing
F. Requires energy 1. autotrophs:
- make their own food2. heterotrophs:
- get food from other organisms
Praying Mantis eating a Grasshopper
F. Requires energy
Praying mantis eating a snake.
G.G. Maintains homeostasisMaintains homeostasis - the stable
internal environment necessary for life
H.H. Adaptations evolve over Adaptations evolve over timetime
TheTheEndEnd