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U1 Evolution
Introduction to Biology and Evolution
49
Biology
11th Grade
06/18/2013

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Term
Six Basic Concepts
Definition
Unity/Diversity
Interaction
Structure/Function
Continuity
Homeostasis
Change
Term
Unity/Diversity
Definition
many common patterns (inheritance)
infinite variety of life (no two identical)
Term
Interaction
Definition
living things affect and are affected by their surroundings
Term
Structure/Function
Definition
*almost* every structure has a function
Term
Continuity
Definition
life is continuous (arises from life)
Term
Homeostasis
Definition
maintaining a constant internal balance
Term
Change through time
Definition
organisms today are different than the past
EVOLUTION
Term
Atoms
Definition
smallest particle of an element
Term
Molecules
Definition
two or more atoms making a compound
organic = carbon
Term
Cytoplasm
Definition
mixture of compounds forming living material of cells
Term
Cell
Definition
smallest unit of life
(complex forms made up of cells)
Term
Tissue
Definition
specialized cells performing the same funcion (muscles, fat)
Term
Organs
Definition
group of tissues that carry out a set of functions
-heart
Term
System
Definition
group of organs that carry out a major body function
- circulatory system (heart, arteries, etc.)
Term
Organism
Definition
Independent, functioning living thing
Term
Population
Definition
group of similar organisms - species
Term
Community
Definition
collection of populations within a natural area
Term
Ecosystem
Definition
community AND non-living parts of environment
Term
Biome
Definition
major areas of earth characterised by life forms...maintained by climate
Term
Biosphere
Definition
the whole entire world layer that has life in it
deepest swimming ocean-life to the highest flying bacteria
Term
Species
Definition
any organism that can:
- breed naturally
- have similar offspring
Term
Binomial Nomenclature
Definition
two part scientific name (species name)
genus + specific name
Term
Classifying in order...
least -> most specific
Definition
1 Kingdom
2 Phylum
3 Class
4 Order
5 Family
6 Genus
7 Specific Name
Term
Monera
Definition
Unicellular, Prokaryotic
-Bacteria
Term
Protista
Definition
Unicellular, Eukaryotic
- Ameba, Paramecium
Term
Fungi
Definition
Multicellular, Heterotrophic, Cell Walls
- Mushrooms, Molds
Term
Plantae
Definition
Multicellular, Autotrophic, Cellulose cell walls
- Flowers, apples, moss...
Term
Animalia
Definition
Multicellular, Heterotrophic, Ingestive
Term
DNA
Definition
4 bases - ATGC
chain-like molecule of repeating subunits
Term
Nucleotide
Definition
Subunit DNA is made up of
made of 3 parts:
1- Phosphorus
2- 5 carbon sugar
3- 1 of 4 different bases
Term
Proteins
Definition
Strings of amino acids
Term
Genetic code
Definition
order of bases (atcg)
codes for every protein
Term
Gene
Definition
section of DNA that codes for one protein
300-300 000 bases long
Term
Mutation
Definition
a change in the order of the bases of the genetic code
Term
Ascent with Modification
Definition
Change over time
FACT!
Term
Homologous Structure
Definition
Have similar structure but different functions
- Human arm, bat wing, whale flipper, dog forelimb...
Same basic structure but different functions
* same structure adapted to different environments
Term
Convergent Evolution
Definition
unrelated organisms become similar because they adapted to the same environments
-Tuna (fish)
Shark (cartilaginous fish)
Dolphin (reptile)
Because they are all rapid swimming predators in an open ocean
Term
Vestigial Structures
Definition
Lost their use but are still present
- Human tailbone
- snakes with creepy little leg bones
Term
Adaptive Radiation
Definition
similar organisms radiate from an area and adapt to their new areas = key characteristics vital to survival of specific organism in the new environment
- new species appear
Darwin's Galapagos Finches
Term
Genetic Drift
Definition
small populations show rapid, random gene changes
Term
Mutation
Definition
radiation or chemicals cause random mutations in DNA
detrimental to organism
Term
Sexual VS Asexual
Definition
sexual = insures variation of genes so population is able to adapt and survive in changing environments

way better than asexual reproduction (often becomes extinct
Term
Reproductive Isolation
Definition
populations grow into different species because they can't interbreed naturally
Term
Directional selection
Definition
selection in one direction away from the average
-changes a characteristic slowly over time
Term
Stabilizing Selection
Definition
Selection towards the average
- keeps organisms the same (no adaptations)
Term
Disruptive Selection
Definition
selection away from the average (both extremes)
- new species + traits
Term
Lamark
Definition
life has evolved - Gradual Change!
1) Law of Use and Disuse: parts that are used more evolve more vs not used would be less developed
2) Theory of Acquired Characteristics: pass on traits during their lifetime
Term
Darwin
Definition
Origin of Species
THEORY OF NATURAL SELECTION
Term
Theory of Natural Selection
6 parts
Definition
1)Populations can increase exponentially
2)But guess what? They don't.
3)So many must die before reproducing
4)Traits are varied within a species
5)Some traits are hotter than others
6)Traits are passed to offspring

Hot guys (with favourable traits) get laid
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