Lecture Notes for BIO120

Core Tenets of Evolution:
1. Living things change over time.
2. Adaptations have arisen through natural selection.
Organisms on Earth have changed gradually over time, where all species have a common ancestor.
The generation of biodiversity is a result of lineages split by speciation ("a group within species separates from other members and develops its own unique characteristics").
Evolution = Biodiversity + Adaptation
A unifying principle in biology, influencing various fields of study.
Change in inherited attributes(특성) across generations leads to evolutionary processes.

Biodiversity: The diversity of life on Earth and the number/kinds of living organisms in a given area.
Adaptation:
- As a state $[1]$ : Any trait that makes an organism better able to survive or reproduce in a given environment (noun).
- As a process $[2]$ : The evolutionary process that leads to the origin and maintenance of such traits (verb).
Microevolution: Evolutionary patterns and processes observed within species or small group of organisms over a short period.
Macroevolution: Evolutionary patterns and processes observed among species and result in the formation of new species, or larger taxonomic groups.

Evolutionary History: Patterns
- Goals:
  - Determine the evolutionary relationships of organisms in terms of common ancestry.
  - Identify and understand long-term patterns in evolution.
- In practice:
  - Uses comparative data from sub-disciplines of systematics, biogeography, paleontology, morphology, development, and molecular biology etc.
    - Systematics: classifying organisms and studying their evolutionary relationships.
  - Graphical representation through phylogenetic trees.
  - Trees with different sets of species can represent the same thing; look at the nodes.
Evolutionary Mechanisms: Processes
- Goals:
  - Determine the particular processes responsible for evolutionary change.
  - Identify the major forces of evolution.
- In practice:
  - Use experiments to determine splits in nodes.
  - Processes like natural selection are responsible for evolutionary change.

There are a variety of approaches:
1. Observational: Describe and quantify.
2. Theoretical: Develop models (verbal, graphical, mathematical, computational).
3. Comparative: Obtain same data from many species.
4. Experimental: Manipulate a system to address a specific hypothesis.
Importance of testable and falsifiable hypotheses in scientific theories.

Address public doubts regarding evolution.
Extremely recent scientific concept.
Very personal implications: This has a clear and important impact on how we understand ourselves and our origins as humans.
- Ramifications (파급효과)
It goes against what some religious texts say if you take them word for word.
Recognize evolution's implications, challenging interpretations of scientific concepts and their conflicts with personal beliefs.
However, evolution has as much empirical (경험적) support as any accepted scientific theory.

Understanding public inquiries about origin (e.g., human ancestry).
Applications in medicine:
- They track the evolutions of pathogens to create better medicines to fight diseases (e.g., genomic epidemiology).
Considerations in agriculture:
- Being able to create resistance that fights diseases that kill crops (e.g., resistance in crops).
Environmental impact assessments:
- Studying which/how species are harmful to the environment (related to species adaptation).
Foundations of biological sciences:
- Understanding complex traits through evolutionary context is crucial.

Key terms: adaptation, biodiversity, evolutionary history, evolutionary mechanism, microevolution, macroevolution, phylogenetic approaches.
Importance of grasping conceptual frameworks for questions related to biological research.

Next lecture: Discussion of Darwin's contributions to biology and the revolutionary impact of his theories.