Class Schedule - Crestwood Local Schools
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AP BIOLOGY
Mrs. Thomas
Chapter 1
Introduction: Themes in the
Study of Life
What are Themes?
General
principles or ideas that
occur over and over.
“Themes” are not a test item,
but they are a framework to
organize the study of Biology.
AP Biology Themes
1. Science as a process
2. Evolution
3. Energy Transfer
4. Continuity and Change
AP Biology Themes
5. Relationship of Structure &
Function
6. Regulation
AP Biology Themes
7. Interdependence in Nature
8. Science, Technology and
Society
Why Themes?
We
will see the “themes” at
various times throughout the
course.
Themes can be the basis of
essay exams
Ex.
Regulation of …
Question
How
do we know what is
alive and what is not?
What
Life?
are the properties of
1. Order
Living
things are highly
organized in structure and
function.
Analyzing
a biological
structure gives us clues
about what it does and
how it works
Structure
and Function are
related at all levels
2. Reproduction
Organisms
kind.
reproduce their own
Life
on Earth uses the nucleic
acid and code for Heritable
Information.
3. Growth & Development
Organisms increase in size
and complexity.
Growth
- increase in size.
Development - increase in
complexity.
Life - grows by internal
changes.
4. Energy Utilization
Organisms
take in energy and
transform it to do work.
Organisms
are “open”
systems, they must
continually take in energy.
5. Response To Environment
Organisms
respond to
changes or stimuli in their
environment.
The
speed of the
response may be “fast” or
“slow”.
6. Homeostasis
Organisms
maintain their
internal environment within
tolerable limits.
“homeo” = same
“stasis” = state
7. Evolutionary Adaptation
Organisms
change over
time as they adapt to their
environment.
Organisms
must adapt, move,
or die!
Is this a “good”
adaptation?
8. The Cell Is the “basic unit”
of Life
9. Organisms Die
Science is:
A
process.
A way of “knowing”.
Science is based on:
Observations
Experiments
Deductive
Reasoning
Observations:
Are
the “keystone” to Science.
If it can’t be “observed”, it can’t
be studied by the Scientific
Method.
Can be made through your
senses or through the use of
tools.
Process of Science
Observational
Science
Naturalists,
human genome
May lead to experiments
Experimental
Science
Hypothetico-Deductive
Science
Hypothesis
Deductive reasoning
Reasoning
Induction
Specific
observations to reach
general conclusion
Deduction
From
general premise make
specific prediction
Example
When
I throw a ball in the air,
why does it come back
down?
Inductive
Whenever
I have thrown a ball
in the past, it always comes
back down
Specific observations to
general conclusion
Deductive
Gravity
attracts ball to earth
General rule to specific case
Scientific Method:
Outlines
a series of steps for
answering questions.
Obtains “evidence” through the
use of experiments.
Scientific Method Steps
1. Identify the problem.
2. What is already known?
3. Formulate a hypothesis.
4. Conduct an experiment
changing one variable at a
time. All other factors are
held constant. (Why?)
Scientific Method Steps
5. Collect data. Have
replicates (Why?)
6.Compare data to hypothesis.
Does the data support the
hypothesis?
Comment
Nothing
is ever proven in
science
Can
be disproven
Experiments
either support
or fail to support a particular
hypothesis.
Disproving
a hypothesis is as
important as supporting it
These
experiments are not a
failure
7. Conclusions and new
hypothesis.
Theory
Broader
in scope than
hypothesis.
Not determined by single
experiment, but have been
supported by many
experiments by many
scientists.
Theory
Comprehensive
explanation
supported by abundance of
evidence
Theories allow predictions
Examples of Theories
Atomic
Theory
Gravitational Theory
Theory of Relativity
Cell Theory
Theory of Evolution by
Natural Selection
Basic Evolution
Nothing
in Biology makes
sense except in the light of
Evolution.
Theodosius
Dobzhansky
American Biology Teacher
35:125-129, 1973.
A few points to
remember:
Darwin’s
greatest pieces of
evidence were fossils
Used finches for comparison
from Galapagos islands
Developed natural selection by
spring-boarding from Malthus’
ideas on population limits.
Homologous structures
Provides
further
support for
evolution
Differs from
analogous :
ie: bird and
butterfly wings
Success is measured by:
1. Survive
2. Reproduce
Note – organisms survive
because of their adaptations,
they do not adapt to survive.
Evolution in Biology
1. What is the adaptive value of
________?
2. Why has ______ persisted
over time?
3. How does _____ increase
survival or reproduction?
4 themes that unify
Biology as a science…
Cell
Theory
Molecular basis of inheritance
Evolutionary change
Evolutionary conservation
Know
the basis of all of these!
Summary
Themes
can provide a common
framework for learning Biology
What are the characteristics of
Life?
What is Science and how does it
work?
Evolution’s role in the study of
Biology