AP Biology Adapted from: Kim Foglia Chapter 13:The Cell Cycle.
Study of Life Themes ppt by Kim Foglia with modifications by J. Coleman
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Transcript of Study of Life Themes ppt by Kim Foglia with modifications by J. Coleman
AP Biology
Themes Science as a process of
inquiry questioning & investigation
Evolution Energy transfer Continuity & Change Relationship of structure to function Regulation Interdependence in nature Science, technology & society
AP Biology
Science as a process of inquiry Built on repeatable observations &
testable, falsifiable hypotheses
2007-2008 AP Biology
"Nothing in biology makes sense except in the light of evolution."
-- Theodosius DobzhanskyMarch 1973
Geneticist, Columbia University
(1900-1975)
AP Biology
Natural selection Evolutionary change is a
product of the process of natural selection
Organisms don’t adapt;
Organisms have adaptations.
AP Biology
Evolution explains unity & diversity Unity
what do organisms have in common & why do similarities exist? common biochemistry & physiology
evolutionary relationships connected through common ancestor
Diversity but why are there
differences? natural selection adaptations allow different
individuals to survive in different environments
AP Biology
Organizing systems Making sense out of the diversity Hierarchical
scheme
Eastern gray squirrelSciurus carolinensis
AP Biology
Continuity & change Continuity of life is based on heritable
information in the form of DNA DNA – the genetic
material – carries biological information from one generation to the next
Cornerstone of evolutionary change as well
You can make more,a lot like you!
TRAIT
AP Biology
Energy transfer It takes ENERGY to keep
stuff from falling apart! At the cellular level
Photosynthesis - harvest
Respiration - use At the ecosystem level
Energy Flow sun > producers > consumers
Nutrient Cycling Materials used to build
bodies go round ‘n round….
ENTROPY RULES!DECOMPOSERS RULE, too!
nutrients
AP Biology
Energy Harvesting and Nutrient Cycling…
You think they’re eating…
They’re actually harvestingenergy and cycling
nutrients!
AP Biology
Form follows function The alignment of structure & function is
seen at all levels of biology
organism
cell organelle
organ
AP Biology
Regulation Organisms need to maintain a “steady state”
in the face of changing conditions maintain homeostasis achieve this through feedback
monitor the body like a thermostat turn on when it’s needed, off when its not
AP Biology
Regulation But individual
organisms are not the only biological entities that regulate…
Entire ecosystems undergo regulation as well Predator / prey
relationships Nutrient cycling And this leads us
to….
AP Biology
Science, technology & society Science & particularly technology profoundly change society
TV, computers, cell phones, DNA technologies, medicine… Science & technology must function within the rules of society
ethics
AP Biology
Themes Science as a process of
inquiry questioning & investigation
Evolution Energy transfer Continuity & Change Relationship of structure to function Regulation Interdependence in nature Science, technology & society
AP Biology
Why study themes of Biology? Biology is an ever expanding body of
knowledge too much to memorize it all need to generalize create a framework upon which to
organize new knowledge themes are the key to understanding
the true nature of living organisms DON’T drown in the details!